CN104080136A - Method and device for achieving dynamic migration of virtual base stations in BBU pool - Google Patents
Method and device for achieving dynamic migration of virtual base stations in BBU pool Download PDFInfo
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Abstract
The invention aims at providing a method, a device and a system for achieving dynamic migration of virtual base stations in a BBU pool. A second virtual base station for accepting migration of a first virtual base station is determined by utilizing a migration management device according to a migration request of the first virtual base station; the first virtual base station sends a corresponding migration relevant parameter to the second virtual base station; the second virtual base station configures a corresponding communication tunnel according to the migration relevant parameter; the first virtual base station switches a corresponding data path and an interface to the second virtual base station according to the communication tunnel. Compared with the prior art, the method, the device and the system achieve non-destructive virtual base station migration, millisecond-magnitude-order service interruption time and packet loss freeing, ensure the service quality and enable users not to feel the migration process.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of for realizing the technology of the dynamic migration of BBU pond virtual base station.
Background technology
Intel Virtualization Technology (Virtualization Technology) be current conventional, in the hardware cell of a multinuclear, support a plurality of means of base station independently to each other, it is according to the requirement of corresponding air-interface standard, for each virtual base station distributes enough computer resources, to guarantee separate in operating system aspect of each virtual base station.
Known according to statistics, in wireless access network, mobile network's the fluctuation of load is very large.For example, the load of each base station conventionally will be well below the load of the time of working by day in the second half of the night time.Yet, in the prior art, even if now virtual base station needs work to be processed few, the energy that its host's machine will consume still with the energy that need to consume in the period that is busy with one's work in same level.In fact, if a plurality of hosts can be moved to (realizing load converges) on a hardware cell by the virtual base station on different hardware unit, can greatly reduce the energy resource consumption of wireless access network, make its environmental protection more.And when the load rise of virtual base station, virtual base station is distributed/migrated on the hardware cell with enough resources and (realize load distribution).
In traditional networking technology area, based on internal memory pre-copy (memory pre-copy) technology, most of commercial virtual platform is supported virtual machine dynamic migration.Can confirm, in data center's infrastructure, by utilizing virtual machine dynamic migration can significantly reduce energy consumption.And in virtual machine (vm) migration process, cannot avoid downtime.For conventional I T platform, application is based on ICP/IP protocol, and the re-transmission time granularity that this protocol suite provides is in level second.The existing application program based on ICP/IP protocol can be stood the out of service time of several seconds.
And existing virtual machine (vm) migration scheme cannot be applied in virtual base station dynamic migration, due to different from traditional IT application, virtual base station is carried out real-time signal and is processed, known through experiment, adopt similar internal memory pre-copy technology to move LTE PUSCH stack, will make virtual machine environment (for example VMware or KVM platforms) have the time of several seconds nearly to use, for each virtual base station that real time service need to be provided, within the so long time, can not provide service is cannot be received.
Therefore, how to realize when virtual base station dynamic migration, out of service time is short as much as possible, becomes those skilled in the art's technical problem urgently to be resolved hurrily.
Summary of the invention
The object of this invention is to provide a kind of for realizing method, equipment and the system of the dynamic migration of BBU pond virtual base station.
According to an aspect of the present invention, provide a kind of for realizing the method for the dynamic migration of BBU pond virtual base station, wherein, the method comprises the following steps:
A migration management equipment is according to about the migration request of the first virtual base station, is identified for accepting the second virtual base station of the migration of described the first virtual base station, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond;
Described in b, the first virtual base station is sent to described the second virtual base station by corresponding migration relevant parameter;
Described in c, the second virtual base station configures its corresponding communication tunnel according to described migration relevant parameter;
D is according to described communication tunnel, and described the first virtual base station switches to described the second virtual base station by corresponding data path and interface.
According to a further aspect in the invention, also provide a kind of for realizing the migration management equipment of the dynamic migration of BBU pond virtual base station, wherein, this equipment comprises:
Management devices, for according to about the migration request of the first virtual base station, is identified for accepting the second virtual base station of the migration of described the first virtual base station, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
In accordance with a further aspect of the present invention, also provide a kind of for realizing the first virtual base station of the dynamic migration of BBU pond virtual base station, wherein, this equipment comprises:
Dispensing device, is sent to described the second virtual base station by the migration relevant parameter corresponding to described the first virtual base station, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond;
The first switching device shifter, for switching to described the second virtual base station by corresponding data path and interface.
According to another aspect of the invention, also provide a kind of for realizing the second virtual base station of the dynamic migration of BBU pond virtual base station, wherein, this equipment comprises:
Receiving system, the migration relevant parameter corresponding to described the first virtual base station sending for receiving described the first virtual base station, wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond;
Inking device, for configuring its corresponding communication tunnel according to described migration relevant parameter;
The second switching device shifter, for according to described communication tunnel, data path and interface that described the first virtual base station is corresponding switch.
According to a further aspect in the invention, also provide a kind of for realizing the communication system of the dynamic migration of BBU pond virtual base station, wherein, described communication system comprises according to migration management equipment described above, at least one is for realizing the first virtual base station as described above, and at least one is for realizing the second virtual base station as described above.
Compared with prior art, the present invention utilizes migration management equipment according to about the migration request of the first virtual base station, is identified for accepting the second virtual base station of the migration of described the first virtual base station; Described the first virtual base station is sent to described the second virtual base station by corresponding migration relevant parameter; Described the second virtual base station configures its corresponding communication tunnel according to described migration relevant parameter; According to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding data path and interface.Thereby realized harmless virtual base station migration, reached the out of service time of the millisecond order of magnitude, and realized without packet loss, guaranteed service quality, and made user can not perceive the generation of transition process.
And the present invention can also utilize migration management equipment or the first virtual base station to detect corresponding migration trigger condition, when meeting described migration trigger condition, migration management equipment/the first virtual base station generates/sends corresponding migration request; Thereby realized the management to the dynamic migration of virtual base station in BBU pond, improved the efficiency of dynamic migration, reduced the energy consumption in BBU pond.
And the processing procedure that the present invention can also be based on dynamic migration, before migration, extends instruction by described the first virtual base station to sending discontinuous receiving cycle (DRX cycle) with the corresponding subscriber equipment of described the first virtual base station; After migration, by described the second virtual base station, to described subscriber equipment, send discontinuous receiving cycle and recover instruction; Thereby reduced the impact of transition process on subscriber equipment.
And the present invention can also be according to described communication tunnel, described the first virtual base station switches to the second virtual base station by corresponding IQ data path and S1/X2 interface respectively; Thereby guarantee that the user data in transition process is harmless in uplink and downlink link, and the small out of service time of realizing Millisecond.
And, the present invention can also be according to described communication tunnel, described the first virtual base station is sent to described the second virtual base station by corresponding traffic state information, and state the second virtual base station based on described traffic state information, carry out the processing operation corresponding with described traffic state information; Thereby guarantee not losing of user data, accomplish seamless switching.
And the present invention can also work as one or more virtual base stations on the corresponding BBU of described the first virtual base station all by after migration, closes the BBU corresponding with described the first virtual base station; To reduce energy resource consumption, realize the object of energy-conserving and environment-protective.
Accompanying drawing explanation
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 illustrates a kind of for realizing the method flow diagram of the dynamic migration of BBU pond virtual base station according to one aspect of the invention;
Fig. 2 illustrates in accordance with a preferred embodiment of the present invention a kind of for realizing the method schematic diagram of the dynamic migration of BBU pond virtual base station;
Fig. 3 illustrate according to one aspect of the invention by migration management equipment, the first virtual base station and the second virtual base station coordinate realize for realizing the system schematic of the dynamic migration of BBU pond virtual base station;
Fig. 4 illustrate in accordance with a preferred embodiment of the present invention a kind of by migration management equipment, the first virtual base station and the second virtual base station coordinate realize for realizing the system schematic of the dynamic migration of BBU pond virtual base station;
Fig. 5 illustrates a kind of system schematic of switching for carrying out the switching of IQ data path and S1/X2 interface according to a preferred embodiment of the present invention.
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 illustrates a kind of for realizing the method flow diagram of the dynamic migration of BBU pond virtual base station according to one aspect of the invention.The method according to this invention, comprises the step S31 being carried out by migration management equipment 3, the step S11, the step S12 that by the first virtual base station 1, are carried out, and the step S21 being carried out by the second virtual base station 2.Particularly, in step S31, migration management equipment is according to about the migration request of the first virtual base station, is identified for accepting the second virtual base station of the migration of described the first virtual base station, wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond; In step S11, described the first virtual base station is sent to described the second virtual base station by corresponding migration relevant parameter; In step S21, described the second virtual base station configures its corresponding communication tunnel according to described migration relevant parameter; In step S12, according to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding data path and interface.
Wherein, virtual base station of the present invention comprises the virtual base station that adopts Intel Virtualization Technology to realize by baseband signal processing unit BBU (Baseband Signal Processing Unit).Wherein, each BBU can realize one or more virtual base stations.
Wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
In step S31, migration management equipment is according to the migration request about the first virtual base station, be identified for accepting the second virtual base station of the migration of described the first virtual base station, wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
Particularly, described migration management equipment is according to the migration request about the first virtual base station, by for example periodically from hypervisor/or virtual base station collect the resource using information of each BBU and/or virtual base station, judge the resource service condition on each BBU and/or virtual base station, for example, when BBU difference other BBUs corresponding with described the first virtual base station have enough available resources, determine that described BBU is for accepting the BBU of described the first virtual base station, and then on described BBU, be identified for accepting the second virtual base station of the migration of described the first virtual base station, wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
At this, described migration request can be determined by described migration management equipment, by described migration management equipment periodically from hypervisor/or virtual base station collect the resource using information of each BBU and/or virtual base station, according to collected resource using information, determine the first virtual base station that needs migration, thereby generate the migration request about the first virtual base station; Also can obtain the migration request about the first virtual base station of being sent by described the first virtual base station by described migration management equipment, be that described migration request is generated according to the resource using information of self by described the first virtual base station, and by predefined communication protocol, described migration request is sent to described migration management equipment.
Preferably, described migration management equipment 3 can also comprise step S32 (not shown) and step S33 (not shown) before step S31, in step S32, described migration management equipment 3 detects whether meet the migration trigger condition of carrying out virtual base station migration; In step S33, described migration management equipment 3 is when meeting described migration trigger condition, and described migration management equipment generates the migration request about corresponding the first virtual base station of described migration trigger condition.
Particularly, in step S32, described migration management equipment 3 by for example periodically from hypervisor/or virtual base station collect the resource using information of each BBU and/or virtual base station, according to collected resource using information, detect corresponding virtual base station and whether meet the migration trigger condition of moving; Wherein, described resource using information includes but not limited to that CPU is used the one or more of information, memory usage information etc.; Wherein, described migration trigger condition includes but not limited to following any one:
The resource of-described virtual base station is used below or above certain threshold value; For example, when the resource of described virtual base station is used lower than certain threshold value, think that this virtual base station need to move, to reach energy-conservation object;
-described virtual base station the load of corresponding BBU below or above certain threshold value; For example, the load on certain BBU is risen, and while surpassing certain threshold value, the one or more virtual base stations that move on described BBU is moved, to reach the object of load balancing;
-according to other set certain trigger conditions of system; For example, when described BBU or virtual base station need to carry out software/hardware while safeguarding, after the virtual base station migration that can move on described BBU, safeguard again, thereby can not affect served user, realize the transparent migration to user.
In step S33, when meeting described migration trigger condition, described migration management equipment, to meeting the corresponding virtual base station of described migration trigger condition, generates migration request; Describedly meet the corresponding virtual base station of described migration trigger condition and be described the first virtual base station.
Preferably, described the first virtual base station 1 can also comprise step S13 (not shown) and step S14 (not shown) before step S31; In step S13, described the first virtual base station 1 detects the migration trigger condition corresponding with described the first virtual base station; In step S14, when meeting described migration trigger condition, described the first virtual base station 1 sends migration request about described the first virtual base station to described migration management equipment.
Particularly, in step S13, described the first virtual base station 1 by for example periodically from hypervisor/or the first virtual base station collect the resource using information of described the first virtual base station, according to collected resource using information, detect described the first virtual base station and whether meet the migration trigger condition of moving; Wherein, described migration trigger condition includes but not limited to following any one:
The resource of-described the first virtual base station is used below or above certain threshold value; For example, when the resource of described the first virtual base station is used lower than certain threshold value, think that this first virtual base station need to move, to reach energy-conservation object;
-according to other set certain trigger conditions of system; For example, when arriving described the first virtual base station or the BBU corresponding with described the first virtual base station or system etc. and need to carry out the time of software/hardware maintenance, can after described the first virtual base station migration, safeguard again, thereby can not affect served user, realize the transparent migration to user.
When meeting described migration trigger condition, in step S14, described the first virtual base station is sent to described migration management equipment by the described migration request about described the first virtual base station.In described migration request, comprise the id information corresponding with described the first virtual base station, resource using information etc.
More preferably, the method also comprises step S15 (not shown); In step S15, when described the first virtual base station gets after the migration request about described the first virtual base station, described the first virtual base station 1 refusal hand-off request.
Particularly, in step S15, when described the first virtual base station receives after the migration request about corresponding the first virtual base station of described migration trigger condition being generated by described migration management equipment 3, or when described the first virtual base station sends after the migration request about corresponding the first virtual base station of described migration trigger condition being generated by self to described migration management equipment 3, described the first virtual base station is refused any hand-off request, to avoid the impact on transition process of new hand-off request.
Wherein, described hand-off request includes but not limited to following any one or multinomial:
-S1 hand-off request;
-X2 hand-off request.
In step S11, described the first virtual base station is sent to described the second virtual base station by corresponding migration relevant parameter.
Particularly, when described migration management equipment is according to the migration request about the first virtual base station, after being identified for accepting second virtual base station of migration of described the first virtual base station, described the first virtual base station is sent to described the second virtual base station by corresponding migration relevant parameter.
Wherein, described migration relevant parameter comprises the relevant information that BBU need use when adopting Intel Virtualization Technology to realize base station.
Preferably, described migration relevant parameter comprises one or more in following two category informations:
I) community relevant information (Cell-specific), for example, the parameters such as system information block (SIB, Service Information block), S1/X2IEs, O & M information (operation and maintenance);
Ii) subscriber equipment relevant information (UE-specific), for example, key K
eNB, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI symbol (C-RNTI, Cell Radio Network Temporary Identifier), discontinuous reception (DRX, Discontinuous Reception) cycle, RAB (RAB, Radio Access Bearer), SAE-temporary mobile subscriber identity (S-TMSI, SAE-Temporary Mobile Subscriber Identity) etc.
Because those skilled in the art should determine while realizing virtual base station by BBU to obtain which virtual base station parameter according to actual conditions and demand, only for example at this, repeat no more.
In step S21, described the second virtual base station configures its corresponding communication tunnel according to described migration relevant parameter.
Particularly, described the second virtual base station obtains the corresponding migration relevant parameter that described the first virtual base station sends, and according to described migration relevant parameter, corresponding communication tunnel is configured.At this, described communication tunnel includes but not limited to following any one or multinomial:
I) uplink path;
Ii) GTP tunnel, the communication tunnel that the tunnel protocol GT P (GPRS Tunnel Protocol) based in GPRS (General Packet Radio Service) sets up.
In step S12, according to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding data path and interface.
Particularly, described the first virtual base station is according to described communication tunnel, and the communication protocol based on predetermined, switches to described the second virtual base station by corresponding data path and interface.At this, described data path and interface include but not limited to one or more in IQ data path, S1 interface, X2 interface.
Preferably, described step S12 comprises step S121 (not shown) and step S122 (not shown), wherein, and in step S121, according to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding IQ data path; In step S122, according to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding S1/X2 interface.At this, described IQ data are orthogonal data in the same way.
Particularly, in step S121, according to described communication tunnel, first described the first virtual base station carries out the switching of IQ data path.With reference to Fig. 5, the switching of IQ data path is that the IQ switching command that the IQ switch (IQ switch) in Fig. 5 sends according to described the first virtual base station completes.Wherein, described the first virtual base station and the second virtual base station lay respectively on a BBU and the 2nd BBU.
At this, with general IQ data path, switch to example:
1) after communication tunnel has been set up, the first virtual base station by existing S1/X2 Link redirect to described the second virtual base station;
2) described the first virtual base station sends IQ data path switching command to IQ switch;
3) described IQ switch switches to described the second virtual base station by IQ data path.
In Fig. 5, between IQ switch and the first virtual base station be connected and IQ switch and the second virtual base station between be connected and be generally optical fiber and connect.
Those skilled in the art will be understood that the mode of above-mentioned switching IQ data path is only for giving an example; the mode of other switching IQ data paths existing or that may occur is from now on as applicable to the present invention; also should be included in protection range of the present invention, and with way of reference, be contained in this at this.
After described IQ data path has switched, in step S122, described the first virtual base station starts to carry out the switching of S1/X2 interface.With reference to Fig. 5, the switching in the uplink/downlink path of S1/X2 interface is that the corresponding switching command that the S-GW (gateway, Serving Gateway) in Fig. 5 sends according to described the first virtual base station completes.
At this, in actual applications, the switching of described S1/X2 interface mainly comprises the switching to S1 downlink path.At this, with the example that switches to of S1 downlink path:
1) the first virtual base station sends downlink path and handovers request to MME (Mobility Management Entity);
2) described MME, according to described downlink path handover request, sends downlink path update request to S-GW;
3) described S-GW switches to described the second virtual base station by S1 downlink path.
Those skilled in the art will be understood that the mode that above-mentioned S1/X2 interface switches is only for example; the mode that other S1/X2 interfaces existing or that may occur from now on switch is as applicable to the present invention; also should be included in protection range of the present invention, and with way of reference, be contained in this at this.
Fig. 2 illustrates in accordance with a preferred embodiment of the present invention a kind of for realizing the method schematic diagram of the dynamic migration of BBU pond virtual base station; The method according to this invention, comprises the step S31 ' being carried out by migration management equipment 3, step S11 ', the step S111 ', the step S12 ' that by the first virtual base station 1, are carried out, and the step S21 ', the step S22 ' that by the second virtual base station 2, are carried out.Particularly, in step S31 ', migration management equipment is according to about the migration request of the first virtual base station, is identified for accepting the second virtual base station of the migration of described the first virtual base station, wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond; In step S11 ', described the first virtual base station is sent to described the second virtual base station by corresponding migration relevant parameter; In step S111 ', described the first virtual base station extends instruction to sending discontinuous receiving cycle with the corresponding subscriber equipment of described the first virtual base station; In step S21 ', described the second virtual base station configures its corresponding communication tunnel according to described migration relevant parameter; In step S12 ', according to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding data path and interface; In step S22 ', described the second virtual base station sends discontinuous receiving cycle to described subscriber equipment and recovers instruction.
Wherein, the described step S31 ' being carried out by migration management equipment 3, the step S11 ' being carried out by the first virtual base station 1,, step S12 ', and the step S21 ' being carried out by the second virtual base station 2, all same or similar with corresponding step in Fig. 1, therefore do not repeat them here, and mode is by reference contained in this.
In step S111 ', described the first virtual base station extends instruction to sending discontinuous receiving cycle with the corresponding subscriber equipment of described the first virtual base station.
Particularly, described the first virtual base station is to sending the instruction of discontinuous reception (DRX) cycle stretch-out with the corresponding subscriber equipment of described the first virtual base station, the DRX cycle of described subscriber equipment is increased, guarantee that described subscriber equipment is converted into resting state, to reduce the impact of transition process on described subscriber equipment as far as possible.At this, described subscriber equipment comprises one or more in active user equipment and non-active user equipment.
In step S22 ', described the second virtual base station sends discontinuous receiving cycle to described subscriber equipment and recovers instruction.
Particularly, after step S12 ', transition process completes, and described the second virtual base station sends the recovery instruction of discontinuous reception (DRX) cycle to described subscriber equipment, makes described subscriber equipment recover normal DRX cycle.
Preferably, described step S12 ' also comprises step S16 ' (not shown) and step S23 ' (not shown), wherein, and in step S16 ', according to described communication tunnel, described the first virtual base station is sent to described the second virtual base station by corresponding traffic state information; In step S23, described the second virtual base station, based on described traffic state information, is carried out the processing operation corresponding with described traffic state information.
Particularly, according to described communication tunnel, in step S16 ', described the first virtual base station will be sent to described the second virtual base station with the corresponding traffic state information of described the first virtual base station, at this, described traffic state information includes but not limited to link data and/or state information; Such as buffering down link data, up link accepting state etc.Thereby realize the collection of current handled business datum and forwarding, assurance user data is not lost, and accomplishes seamless switching.
Correspondingly, in step S23 ', the traffic state information that described the second virtual base station sends based on described the first virtual base station, according to the difference of described traffic state information, carry out corresponding as replied or continuing the operations such as processing, thereby guaranteed service quality, accomplished seamless switching.
Preferably, after described step S12 ', the method also comprises step S32 ' (not shown), wherein, in described step S32 ', one or more virtual base stations on the corresponding BBU of described the first virtual base station all, by after migration, are closed the BBU corresponding with described the first virtual base station.
Particularly, the one or more virtual base stations on the corresponding BBU of described the first virtual base station, all by after migration, by described migration management equipment, send out code to described BBU, close the BBU corresponding with described the first virtual base station.Or the one or more virtual base stations on the corresponding BBU of described the first virtual base station are all by after migration, described BBU detects self corresponding one or more virtual base station and is all moved, and described BBU automatically performs and closes.
Fig. 3 illustrate according to one aspect of the invention by migration management equipment, the first virtual base station and the second virtual base station coordinate realize for realizing the system schematic of the dynamic migration of BBU pond virtual base station; Wherein, described migration management equipment 3 comprises management devices 31; The first virtual base station 1 comprises dispensing device 11, the first switching device shifter 12; The second virtual base station 2 comprises receiving system 21, inking device 22, the second switching device shifter 23.Particularly, management devices 31 is according to the migration request about the first virtual base station, be identified for accepting the second virtual base station of the migration of described the first virtual base station, wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond; Dispensing device 11 is sent to described the second virtual base station by corresponding migration relevant parameter, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond; Receiving system 21 receives the migration relevant parameter corresponding to described the first virtual base station that described the first virtual base station sends, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond; Inking device 22 configures its corresponding communication tunnel according to described migration relevant parameter; The first switching device shifter 12 and the second switching device shifter 23 coordinate, and according to described communication tunnel, data path and interface that described the first virtual base station is corresponding switch to described the second virtual base station.
Those skilled in the art will be understood that, for ease of explanation, at this, described migration management equipment, the first virtual base station and the second virtual base station are coordinated to explanation, described migration management equipment, the first virtual base station and the second virtual base station can coordinate the dynamic migration of realizing virtual base station in BBU pond; Also can distinguish separately and coordinate with the equipment of other adaptations, to realize the dynamic migration of virtual base station in BBU pond.For example, described migration management equipment can be independent of described the first virtual base station and described the second virtual base station, matches, to realize the dynamic migration of virtual base station in BBU pond with other base stations.
Wherein, virtual base station of the present invention comprises the virtual base station that adopts Intel Virtualization Technology to realize by baseband signal processing unit BBU (Baseband Signal Processing Unit).Wherein, each BBU can realize one or more virtual base stations.
Wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
Management devices 31 is according to the migration request about the first virtual base station, is identified for accepting the second virtual base station of the migration of described the first virtual base station, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
Particularly, described migration management equipment is according to the migration request about the first virtual base station, by for example periodically from hypervisor/or virtual base station collect the resource using information of each BBU and/or virtual base station, judge the resource service condition on each BBU and/or virtual base station, for example, when BBU difference other BBUs corresponding with described the first virtual base station have enough available resources, determine that described BBU is for accepting the BBU of described the first virtual base station, and then on described BBU, be identified for accepting the second virtual base station of the migration of described the first virtual base station, wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
At this, described migration request can be determined by described migration management equipment, by described migration management equipment periodically from hypervisor/or virtual base station collect the resource using information of each BBU and/or virtual base station, according to collected resource using information, determine the first virtual base station that needs migration, thereby generate the migration request about the first virtual base station; Also can obtain the migration request about the first virtual base station of being sent by described the first virtual base station by described migration management equipment, be that described migration request is generated according to the resource using information of self by described the first virtual base station, and by predefined communication protocol, described migration request is sent to described migration management equipment.
Preferably, described migration management equipment 3 can also comprise management checkout gear (not shown) and migration generating apparatus (not shown), and management checkout gear detects whether meet the migration trigger condition of carrying out virtual base station migration; When meeting described migration trigger condition, the migration generating apparatus of described migration management equipment generates the migration request about corresponding the first virtual base station of described migration trigger condition.
Particularly, management checkout gear by for example periodically from hypervisor/or virtual base station collect the resource using information of each BBU and/or virtual base station, according to collected resource using information, detect corresponding virtual base station and whether meet the migration trigger condition of moving; Wherein, described resource using information includes but not limited to that CPU is used the one or more of information, memory usage information etc.; Wherein, described migration trigger condition includes but not limited to following any one:
The resource of-described virtual base station is used below or above certain threshold value; For example, when the resource of described virtual base station is used lower than certain threshold value, think that this virtual base station need to move, to reach energy-conservation object;
-described virtual base station the load of corresponding BBU below or above certain threshold value; For example, the load on certain BBU is risen, and while surpassing certain threshold value, the one or more virtual base stations that move on described BBU is moved, to reach the object of load balancing;
-according to other set certain trigger conditions of system; For example, when described BBU or virtual base station need to carry out software/hardware while safeguarding, after the virtual base station migration that can move on described BBU, safeguard again, thereby can not affect served user, realize the transparent migration to user.
When meeting described migration trigger condition, the migration generating apparatus of described migration management equipment, to meeting the corresponding virtual base station of described migration trigger condition, generates migration request; Describedly meet the corresponding virtual base station of described migration trigger condition and be described the first virtual base station.
Preferably, described the first virtual base station 1 can also comprise Base station detecting apparatus (not shown) and migration dispensing device (not shown); Base station detecting apparatus detects the migration trigger condition corresponding with described the first virtual base station; When meeting described migration trigger condition, the migration dispensing device of described the first virtual base station 1 sends migration request about described the first virtual base station to described migration management equipment.
Particularly, Base station detecting apparatus by for example periodically from hypervisor/or the first virtual base station collect the resource using information of described the first virtual base station, according to collected resource using information, detect described the first virtual base station and whether meet the migration trigger condition of moving; Wherein, described migration trigger condition includes but not limited to following any one:
The resource of-described the first virtual base station is used below or above certain threshold value; For example, when the resource of described the first virtual base station is used lower than certain threshold value, think that this first virtual base station need to move, to reach energy-conservation object;
-according to other set certain trigger conditions of system; For example, when arriving described the first virtual base station or the BBU corresponding with described the first virtual base station or system etc. and need to carry out the time of software/hardware maintenance, can after described the first virtual base station migration, safeguard again, thereby can not affect served user, realize the transparent migration to user.
When meeting described migration trigger condition, the migration dispensing device of described the first virtual base station is sent to described migration management equipment by the described migration request about described the first virtual base station.In described migration request, comprise the id information corresponding with described the first virtual base station, resource using information etc.
More preferably, the first virtual base station 1 also comprises refusal device (not shown); When described the first virtual base station gets after the migration request about described the first virtual base station, refusal device refusal hand-off request.
Particularly, when described the first virtual base station receives after the migration request about corresponding the first virtual base station of described migration trigger condition being generated by described migration management equipment 3, or when described the first virtual base station sends after the migration request about corresponding the first virtual base station of described migration trigger condition being generated by self to described migration management equipment 3, refusal device is refused any hand-off request, to avoid the impact on transition process of new hand-off request.
Wherein, described hand-off request includes but not limited to following any one or multinomial:
-S1 hand-off request;
-X2 hand-off request.
Dispensing device 11 is sent to described the second virtual base station by corresponding migration relevant parameter.
Particularly, when described migration management equipment is according to the migration request about the first virtual base station, after being identified for accepting second virtual base station of migration of described the first virtual base station, dispensing device 11 is sent to described the second virtual base station by corresponding migration relevant parameter.
Wherein, described migration relevant parameter comprises the relevant information that BBU need use when adopting Intel Virtualization Technology to realize base station.
Preferably, described migration relevant parameter comprises one or more in following two category informations:
I) community relevant information (Cell-specific), for example, the parameters such as system information block (SIB, Service Information block), S1/X2IEs, O & M information (operation and maintenance);
Ii) subscriber equipment relevant information (UE-specific), for example, key K
eNB, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI symbol (C-RNTI, Cell Radio Network Temporary Identifier), discontinuous reception (DRX, Discontinuous Reception) cycle, RAB (RAB, Radio Access Bearer), SAE-temporary mobile subscriber identity (S-TMSI, SAE-Temporary Mobile Subscriber Identity) etc.
Because those skilled in the art should determine while realizing virtual base station by BBU to obtain which virtual base station parameter according to actual conditions and demand, only for example at this, repeat no more.
Correspondingly, receiving system 21 receives the migration relevant parameter corresponding to described the first virtual base station that described the first virtual base station sends, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
Inking device 22 configures its corresponding communication tunnel according to described migration relevant parameter.
Particularly, inking device 22 obtains the corresponding migration relevant parameter that described the first virtual base station sends, and according to described migration relevant parameter, corresponding communication tunnel is configured.At this, described communication tunnel includes but not limited to following any one or multinomial:
I) uplink path;
Ii) GTP tunnel, the communication tunnel that the tunnel protocol GT P (GPRS Tunnel Protocol) based in GPRS (General Packet Radio Service) sets up.
The first switching device shifter 12 and the second switching device shifter 23 coordinate, and according to described communication tunnel, data path and interface that described the first virtual base station is corresponding switch to described the second virtual base station.。
Particularly, the first switching device shifter 12 and the second switching device shifter 23 coordinate, according to described communication tunnel, and the communication protocol based on predetermined, data path and interface that described the first virtual base station is corresponding switch to described the second virtual base station.At this, described data path and interface include but not limited to one or more in IQ data path, S1 interface, X2 interface.
Preferably, the first switching device shifter 12 and the second switching device shifter 23 coordinate, and according to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding IQ data path; The first switching device shifter 12 and the second switching device shifter 23 coordinate, and according to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding S1/X2 interface.At this, described IQ data are orthogonal data in the same way.
Particularly, according to described communication tunnel, first described the first virtual base station carries out the switching of IQ data path.With reference to Fig. 5, the switching of IQ data path is that the IQ switching command that the IQ switch (IQ switch) in Fig. 5 sends according to described the first virtual base station completes.Wherein, described the first virtual base station and the second virtual base station lay respectively on a BBU and the 2nd BBU.
At this, with general IQ data path, switch to example:
1) after communication tunnel has been set up, the first virtual base station by existing S1/X2 Link redirect to described the second virtual base station;
2) described the first virtual base station sends IQ data path switching command to IQ switch;
3) described IQ switch switches to described the second virtual base station by IQ data path.
In Fig. 5, between IQ switch and the first virtual base station be connected and IQ switch and the second virtual base station between be connected and be generally optical fiber and connect.
Those skilled in the art will be understood that the mode of above-mentioned switching IQ data path is only for giving an example; the mode of other switching IQ data paths existing or that may occur is from now on as applicable to the present invention; also should be included in protection range of the present invention, and with way of reference, be contained in this at this.
After described IQ data path has switched, described the first virtual base station starts to carry out the switching of S1/X2 interface.With reference to Fig. 5, the switching in the uplink/downlink path of S1/X2 interface is that the corresponding switching command that the S-GW (gateway, Serving Gateway) in Fig. 5 sends according to described the first virtual base station completes.
At this, in actual applications, the switching of described S1/X2 interface mainly comprises the switching to S1 downlink path.At this, with the example that switches to of S1 downlink path:
1) the first virtual base station sends downlink path and handovers request to MME (Mobility Management Entity);
2) described MME, according to described downlink path handover request, sends downlink path update request to S-GW;
3) described S-GW switches to described the second virtual base station by S1 downlink path.
Those skilled in the art will be understood that the mode that above-mentioned S1/X2 interface switches is only for example; the mode that other S1/X2 interfaces existing or that may occur from now on switch is as applicable to the present invention; also should be included in protection range of the present invention, and with way of reference, be contained in this at this.
Fig. 4 illustrate in accordance with a preferred embodiment of the present invention a kind of by migration management equipment, the first virtual base station and the second virtual base station coordinate realize for realizing the system schematic of the dynamic migration of BBU pond virtual base station; Wherein, described migration management equipment 3 comprises management devices 31 '; The first virtual base station 1 comprises dispensing device 11 ', the first switching device shifter 12 ', and wherein, dispensing device 11 ' also comprises extension fixture 111 '; The second virtual base station 2 comprises receiving system 21 ', inking device 22 ', the second switching device shifter 23 ', recovery device 24 '.Particularly, management devices 31 ' is according to the migration request about the first virtual base station, be identified for accepting the second virtual base station of the migration of described the first virtual base station, wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond; Dispensing device 11 ' is sent to described the second virtual base station by corresponding migration relevant parameter, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond; Extension fixture 111 ' extends instruction to sending discontinuous receiving cycle with the corresponding subscriber equipment of described the first virtual base station; Receiving system 21 ' receives the migration relevant parameter corresponding to described the first virtual base station that described the first virtual base station sends, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond; Inking device 22 ' configures its corresponding communication tunnel according to described migration relevant parameter; The first switching device shifter 12 ' and the second switching device shifter 23 ' coordinate, and according to described communication tunnel, data path and interface that described the first virtual base station is corresponding switch to described the second virtual base station; Recovery device 24 ' sends discontinuous receiving cycle to described subscriber equipment and recovers instruction.
At this, the management devices 31 ' of described migration management equipment 3; The dispensing device 11 ' of the first virtual base station 1, the first switching device shifter 12 '; The receiving system 21 ' of the second virtual base station 2, inking device 22 ', the second switching device shifter 23 ', all with Fig. 3 in corresponding intrument same or similar, therefore do not repeat them here, and mode is by reference contained in this.
Those skilled in the art will be understood that, for ease of explanation, at this, described migration management equipment, the first virtual base station and the second virtual base station are coordinated to explanation, described migration management equipment, the first virtual base station and the second virtual base station can coordinate the dynamic migration of realizing virtual base station in BBU pond; Also can distinguish separately and coordinate with the equipment of other adaptations, to realize the dynamic migration of virtual base station in BBU pond.For example, described migration management equipment can be independent of described the first virtual base station and described the second virtual base station, matches, to realize the dynamic migration of virtual base station in BBU pond with other base stations.
Wherein, virtual base station of the present invention comprises the virtual base station that adopts Intel Virtualization Technology to realize by baseband signal processing unit BBU (Baseband Signal Processing Unit).Wherein, each BBU can realize one or more virtual base stations.
Wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
Extension fixture 111 ' extends instruction to sending discontinuous receiving cycle with the corresponding subscriber equipment of described the first virtual base station.
Particularly, extension fixture 111 ' is to sending the instruction of discontinuous reception (DRX) cycle stretch-out with the corresponding subscriber equipment of described the first virtual base station, the DRX cycle of described subscriber equipment is increased, guarantee that described subscriber equipment is converted into resting state, to reduce the impact of transition process on described subscriber equipment as far as possible.At this, described subscriber equipment comprises one or more in active user equipment and non-active user equipment.
Recovery device 24 ' sends discontinuous receiving cycle to described subscriber equipment and recovers instruction.
Particularly, after transition process completes, recovery device 24 ' sends the recovery instruction of discontinuous reception (DRX) cycle to described subscriber equipment, makes described subscriber equipment recover normal DRX cycle.
Preferably, the first switching device shifter 12 ' also comprises that state transmitting element (not shown) and the second switching device shifter 23 ' also comprise state processing unit (not shown), wherein, state transmitting element, according to described communication tunnel, is sent to described the second virtual base station by corresponding traffic state information; State processing unit, based on described traffic state information, is carried out the processing operation corresponding with described traffic state information.
Particularly, according to described communication tunnel, state transmitting element will be sent to described the second virtual base station with the corresponding traffic state information of described the first virtual base station, and at this, described traffic state information includes but not limited to link data and/or state information; Such as buffering down link data, up link accepting state etc.Thereby realize the collection of current handled business datum and forwarding, assurance user data is not lost, and accomplishes seamless switching.
Correspondingly, the traffic state information that state processing unit sends based on described the first virtual base station, according to the difference of described traffic state information, carries out corresponding as replied or continuing the operations such as processing, thereby guaranteed service quality, accomplished seamless switching.
Preferably, after migration completes, migration management equipment also comprises shutoff device (not shown), wherein, one or more virtual base stations on the corresponding BBU of described the first virtual base station are all by after migration, and shutoff device cuts out the BBU corresponding with described the first virtual base station.
Particularly, the one or more virtual base stations on the corresponding BBU of described the first virtual base station are all by after migration, and shutoff device sends out code to described BBU, closes the BBU corresponding with described the first virtual base station.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to be included in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limiting related claim.In addition, obviously other unit or step do not got rid of in " comprising " word, and odd number is not got rid of plural number.A plurality of unit of stating in device claim or device also can be realized by software or hardware by a unit or device.The first, the second word such as grade is used for representing title, and does not represent any specific order.
Claims (12)
1. for realizing a method for the dynamic migration of BBU pond virtual base station, wherein, the method comprises the following steps:
A migration management equipment is according to about the migration request of the first virtual base station, is identified for accepting the second virtual base station of the migration of described the first virtual base station, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond;
Described in b, the first virtual base station is sent to described the second virtual base station by corresponding migration relevant parameter;
Described in c, the second virtual base station configures its corresponding communication tunnel according to described migration relevant parameter;
D is according to described communication tunnel, and described the first virtual base station switches to described the second virtual base station by corresponding data path and interface.
2. method according to claim 1, wherein, the method also comprises:
Whether-described migration management equipment Inspection meets the migration trigger condition of carrying out virtual base station migration;
Wherein, the method also comprises:
-when meeting described migration trigger condition, described migration management equipment generates the migration request about corresponding the first virtual base station of described migration trigger condition.
3. method according to claim 1, wherein, the method also comprises:
-described the first virtual base station detects the migration trigger condition corresponding with described the first virtual base station;
Wherein, the method also comprises:
-when meeting described migration trigger condition, described the first virtual base station sends migration request about described the first virtual base station to described migration management equipment.
4. method according to claim 3, wherein, the method also comprises:
-described the first virtual base station refusal hand-off request.
5. according to the method described in any one in claim 1 to 4, wherein, described step b also comprises:
-described the first virtual base station extends instruction to sending discontinuous receiving cycle with the corresponding subscriber equipment of described the first virtual base station;
Wherein, the method also comprises after described steps d:
-described the second virtual base station sends discontinuous receiving cycle to described subscriber equipment and recovers instruction.
6. according to the method described in any one in claim 1 to 5, wherein, described steps d comprises:
-according to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding IQ data path;
-according to described communication tunnel, described the first virtual base station switches to described the second virtual base station by corresponding S1/X2 interface.
7. according to the method described in any one in claim 1 to 6, wherein, steps d also comprises:
-according to described communication tunnel, described the first virtual base station is sent to described the second virtual base station by corresponding traffic state information;
Wherein, the method also comprises:
-described the second virtual base station, based on described traffic state information, is carried out the processing operation corresponding with described traffic state information.
8. according to the method described in any one in claim 1 to 7, wherein, the method also comprises after described steps d:
-one or more the virtual base stations on the corresponding BBU of described the first virtual base station, all by after migration, are closed the BBU corresponding with described the first virtual base station.
9. for realizing a migration management equipment for the dynamic migration of BBU pond virtual base station, wherein, this equipment comprises:
Management devices, for according to about the migration request of the first virtual base station, is identified for accepting the second virtual base station of the migration of described the first virtual base station, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond.
10. for realizing first virtual base station of the dynamic migration of BBU pond virtual base station, wherein, this equipment comprises:
Dispensing device, is sent to described the second virtual base station by the migration relevant parameter corresponding to described the first virtual base station, and wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond;
The first switching device shifter, for switching to described the second virtual base station by corresponding data path and interface.
11. 1 kinds for realizing the second virtual base station of the dynamic migration of BBU pond virtual base station, and wherein, this equipment comprises:
Receiving system, the migration relevant parameter corresponding to described the first virtual base station sending for receiving described the first virtual base station, wherein, described the first virtual base station and described the second virtual base station belong to respectively BBU different in BBU pond;
Inking device, for configuring its corresponding communication tunnel according to described migration relevant parameter;
The second switching device shifter, for according to described communication tunnel, data path and interface that described the first virtual base station is corresponding switch.
12. 1 kinds for realizing the communication system of the dynamic migration of BBU pond virtual base station, wherein, described communication system comprises migration management equipment according to claim 9, at least one is for realizing the first virtual base station as claimed in claim 10, and at least one is for realizing the second virtual base station as claimed in claim 11.
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