CN106792951A - Method and equipment for selecting the target BS of switching - Google Patents
Method and equipment for selecting the target BS of switching Download PDFInfo
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- CN106792951A CN106792951A CN201510824851.2A CN201510824851A CN106792951A CN 106792951 A CN106792951 A CN 106792951A CN 201510824851 A CN201510824851 A CN 201510824851A CN 106792951 A CN106792951 A CN 106792951A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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Abstract
Embodiment of the disclosure is related to the method and corresponding base station of the target BS for selecting switching.A kind of method of the target BS for selecting switching is provided.The method includes：It is determined that multiple candidate target base stations, the plurality of candidate target base station is including by the first candidate target base station of the first machine trustship；And from the plurality of candidate target base station prioritizing selection first candidate target base station as the target BS.A kind of base station is also disclosed, and discloses the method and apparatus for the target machine for determining to migrate.
Description
Technical field
Embodiment of the disclosure relates generally to the communication technology, the method and apparatus of method and corresponding base station more particularly, to the target BS for selecting switching and the target machine for determining to migrate.
Background technology
Base station centralization treatment technology is an important wireless communication technology, and it can bring the communication with the optimization of the performances such as low cost, high bandwidth and low time delay.For example, in the cordless communication network for supporting high in the clouds (Cloud) wireless access network (RAN) framework, the radio-frequency apparatus of such as Remote Radio Unit (RRU) and physical layer (layer 1) equipment can be placed on distal end, these remote equipments are then connected by cable, optical cable etc. with Base Band Unit (BBU) pond.By BBU ponds, centralized management can be carried out to the BBU of different base station.On the one hand, this greatlys save the maintenance cost of base station equipment.On the other hand, in BBU ponds, the data transfer of high bandwidth and low time delay can be carried out between the BBU of different base station, this results in the gain in terms of bandwidth and time delay.
In the centralization computing resource pond in such as BBU ponds, many machines can be included, every machine can have multiple CPU (CPU) and multiple cores.In order to save the cost of implementation of base station, it is also proposed that base station virtualization technology.Base station is embodied as the technology process in machine.In this way, it is not necessary to special equipment, the function of base station is can be achieved with using only general machinery equipment.Using base station virtualization technology, multiple base stations can be run on a machine.And, with significantly improving for machine processing ability, up to a hundred base stations can be run on a machine.
In such communication network, when terminal device needs to switch over, it may appear that following three kinds of handoff scenarios：(1) BBU of source base station and target BS is not in same centralization computing resource pond；(2) on different machines of the BBU of source base station and target BS in same centralization computing resource pond；And the BBU of (3) source base station and target BS is on same machine.However, existing switchover policy is not in view of the differentiation of handoff scenario.
The content of the invention
Usually, embodiment of the disclosure proposes the method and corresponding base station and the method and apparatus for determining the target machine of migration of the target BS for selecting switching.
In a first aspect, a kind of method for the selection target base station in handoff procedure implemented by source base station of embodiment of the disclosure offer, wherein source base station is by the first machine trustship.The method includes：It is determined that multiple candidate target base stations, the multiple candidate target base station is including by the first candidate target base station of the first machine trustship；And from the multiple candidate target base station the first candidate target base station described in prioritizing selection as the target BS.
In second aspect, embodiment of the disclosure provides a kind of base station, and wherein the base station is by the first machine trustship.The base station includes：Handoff candidate determining unit, is configured to determine that multiple candidate target base stations, and the multiple candidate target base station is included by the first candidate target base station of the first machine trustship；And switching target selection unit, target BS of the first candidate target base station described in prioritizing selection as switching is configured as from the multiple candidate target base station.
In the third aspect, embodiment of the disclosure provides a kind of equipment for the selection target base station in handoff procedure.The equipment includes：The method that the memory of processor and the computer program instructions that are stored with, the memory and computer program instructions are configured as the first aspect for making the equipment perform according to the disclosure together with the processor.
In fourth aspect, embodiment of the disclosure provide it is a kind of for determine by first base station migrate to target machine method.The method includes：Receive the handover information related to the first base station；Based on the handover information for being received, the switching times occurred between at least one second base stations and the first base station hosted by the 3rd machine are determined；Identified switching times are compared with pre-determined number threshold value；And exceed the pre-determined number threshold value in response to the switching times, the 3rd machine is defined as the target machine.
The 5th aspect, embodiment of the disclosure provide it is a kind of for determine by first base station migrate to target machine equipment.The equipment includes：Receiving unit, is configured as receiving the handover information related to the first base station；Switching times determining unit, is configured as based on the handover information for being received, and determines the switching times occurred between at least one second base stations and the first base station hosted by the 3rd machine；Comparing unit, is configured as comparing identified switching times with pre-determined number threshold value；And target machine determining unit, the switching times are configured to respond to more than the pre-determined number threshold value, the 3rd machine is defined as the target machine.
The 6th aspect, embodiment of the disclosure provide it is a kind of for determine by first base station migrate to target machine equipment.The equipment includes：The method that the memory of processor and the computer program instructions that are stored with, the memory and computer program instructions are configured as the fourth aspect for making the equipment perform according to the disclosure together with the processor.
Be will be understood that by being described below, in accordance with an embodiment of the present disclosure, when terminal device needs switching, prioritizing selection is with base station of the source base station on uniform machinery as target BS.In handoff scenario in this machine, because source base station can be shared with target BS to the computing resource in machine, it is possible to simplify handoff procedure, so as to reduce handover delay.Other feature and advantage of the disclosure will be easy to understand by being described below.
Brief description of the drawings
Fig. 1 shows the example context that embodiment of the disclosure can be implemented within；
Fig. 2 shows the flow chart for the method for selection target base station in handoff procedure of the one embodiment according to the disclosure；
Fig. 3 a show conventional handover procedure of the prior art；
Fig. 3 b show handoff procedure in the machine of the simplification of the one embodiment according to the disclosure；
Fig. 4 shows the flow chart of the exemplary method performed at source base station in handoff procedure of the one embodiment according to the disclosure；
Fig. 5 shows the block diagram of the base station of the one embodiment according to the disclosure；
Fig. 6 shows the flow chart of the method for the target machine for determining base station migration of the one embodiment according to the disclosure；
Fig. 7 shows the flow chart of the method for determining the target machine that base station migrates according to another embodiment of the disclosure；And
Fig. 8 show the one embodiment according to the disclosure for determine base station migrate to target machine equipment block diagram.
Specific embodiment
The principle of the disclosure is described referring now to some example embodiments.It should be appreciated that describe these embodiments to be intended merely to better understood when those skilled in the art and then realize the disclosure, and the scope of the present disclosure is not limited by any way.
Term " base station " as used herein can represent the low power nodes of node B (NodeB or NB), enode b (eNodeB or eNB), femto base station, femto base station etc..
Term " terminal device " as used herein is to refer to any terminal device with base station communication.As an example, terminal device can include mobile terminal (MT), subscriber stations (SS), portable subscriber platform (PSS), mobile station (MS) or access terminal (AT).
Term as used herein " including " and its deformation be that opening includes, i.e., " including but not limited to ".Term "based" is " being based at least partially on ".Term " one embodiment " expression " at least one embodiment "；Term " another embodiment " expression " at least one further embodiment ".The related definition of other terms is given in will be described below.
Fig. 1 shows the communication network 100 that embodiment of the disclosure can be implemented within.Communication network 100 shown in Fig. 1 can include base station 110,120 and 130 and terminal device 140.It should be understood that the number of the base station and terminal device shown in Fig. 1 has no intention limitation merely for the sake of illustration purpose.In a communication network 100, there may be any an appropriate number of base station and terminal device.
As illustrated, cell 110 ', 120 ' and 130 ' is served in base station 110,120 and 130 respectively, these three Serving cells are adjacent.Correspondingly, base station 110,120 and 130 is adjacent base station.In accordance with an embodiment of the present disclosure, the base station in communication network 100 is by any an appropriate number of machine trustship.As an example, base station 110 and 120 is by the first machine trustship, and base station 130 is different from the second machine trustship of the first machine.First and second machines may belong to identical BBU ponds, or alternatively belong to different BBU ponds.
Communication between base station 110,120 and 130 and terminal device 140 can be implemented according to any appropriate communication protocol, including but not limited to, the first generation (1G), the second generation (2.5G), the third generation (3G), forth generation (4G) communication protocol, the 5th generation (5G) communication protocol and/or any other agreement for being currently known or developing in the future.
Base station 110,120 and 130 and terminal device 140 can use any appropriate wireless communication technology, including but not limited to, CDMA (CDMA), frequency division multiple access (FDMA), time division multiple acess (TDMA), FDD (FDD), time division duplex (TDD), multiple-input and multiple-output (MIMO), OFDM (OFDM), and/or any other technology for being currently known or developing in the future.
As shown in figure 1, terminal device 140 is just leaving the Serving cell 110 ' of base station 110 into the Serving cell 120 ' and 130 ' of base station 120 and 130.Now, for the reliability for ensureing to communicate, terminal device 140 needs to perform the switching from base station 110 to base station 120 or 130.So, it may appear that three kinds of handoff scenarios as described above, i.e. (1) source base station, by the machine trustship in different BBU ponds, switch from target BS also referred to as between website；(2) with target BS by the different machines trustship in same BBU ponds, also referred to as machinery compartment switches source base station；And (3) source base station and target BS are by same machine trustship, switching also referred to as in machine.
Low time delay is always a handoff technique important performance indexes of interest.For example, in the 5th generation (5G) cordless communication network, it is desirable to which handover delay is in below 10ms.When base station 110 and base station 120 or 130 are by same machine trustship, as described above, these base stations can be realized by the different processes in machine, the correspondingly communication between them can be realized by interprocess communication.In this case, the base station and base station 120 or 130 on same machine can share the computing resource of memory, socket, message queue, fifo buffer and pipeline etc., and this sharing can effectively reduce switching delay.
Fig. 2 shows the flow chart of the method 200 for the selection target base station in handoff procedure of the one embodiment according to the disclosure.It should be understood that method 200 can be as shown in Figure 1 communication network 100 in implemented by the base station 110 of the first machine trustship.
Method 200 starts from step 210, and multiple candidate target base stations are determined in this base station 110.In the context of the disclosure, term " candidate target base station " refers to can be as the base station of handoff candidate.For example, as shown in figure 1, when terminal device 140 moves to the intersection of cell 110 ' and cell 120 ' and cell 130 ', base station 120 and/or 130 can be as the candidate target base station of switching.
In accordance with an embodiment of the present disclosure, base station 110 can determine candidate target base station in any suitable manner.In one embodiment, base station can perform the determination based on the neighboring cell measurement reporting received from terminal device 140.For example, terminal device 140 can measure the received signal strength of the signal from neighbor cell 120 ' and/or 130 ' when the border of Serving cell 110 ' of base station 110 is moved to, and the neighboring cell measurement reporting comprising measurement result is sent to base station 110.Base station 110 can determine whether base station 120 and/or 130 can be as candidate target base station after the measurement report is received based on received signal strength therein.
Base station 110 can determine candidate target base station according to any appropriate strategy.In one embodiment, base station 110 can determine candidate target base station according to specified in third generation cooperative partner program (3GPP) agreement as the event A3 (Event A3) of handover trigger event.For example, when the received signal strength of base station 120 and 130 all meets Event A3, base station 120 and 130 can be defined as candidate target base station by base station 110.
In addition to based on the neighboring cell measurement reporting received from terminal device 140 to determine candidate target base station, alternately, base station 110 can also directly pass through inter-base station interface, such as X2 interface, from base station 120 and/or 130 receive corresponding base station signal quality, and the signal quality can corresponding base station received from the terminal device that it is serviced.Then, base station 110 determines which base station can be as candidate target base station according to the signal quality.
Next, method 200 proceeds to step 220, in this base station 110, prioritizing selection and base station 110 are located at base station on uniform machinery as target BS from multiple candidate target base stations.
In accordance with an embodiment of the present disclosure, base station 110 can use any preference policies.In one embodiment, base station 110 can set switching priority higher to the base station on uniform machinery all the time.For example, when base station 120 and 130 is defined as candidate target base station by base station 110 in step 210, the selection of base station 110 is in base station 120 on the first machine together as target BS with it.
In another embodiment, in order to further improve the communication quality after switching, base station 110 can perform above-mentioned prioritizing selection in the case where the signal quality of base station is considered.For example, when base station 120 and 130 is defined as candidate target base station by base station 110 in step 210, it is wherein as described above, base station 110 and 120 is all by the first machine trustship, and base station 130 is different from the second machine trustship of the first machine, base station 110 can first receive the signal quality of base station 120 and 130.It is below convenient to discuss, the signal quality of base station 120 is referred to as the first signal quality, and the signal quality of base station 130 is referred to as secondary signal quality.
In accordance with an embodiment of the present disclosure, base station 110 can receive the signal quality of base station 120 and/or 130 from any appropriate equipment.In one embodiment, base station 110 can receive the signal quality of base station 120 and/or 130 from terminal device 140.The signal quality can be implemented as any appropriate format.For example, the received signal strength that the neighboring cell measurement reporting transmitted by terminal device 140 includes can be as the signal quality of corresponding base station.Alternately, base station 110 can directly receive the signal quality of corresponding base station by X2 interface from base station 120 and/or 130.
Next, base station 110 compares the first signal quality with secondary signal quality.It is more than the first signal quality in response to secondary signal quality.It is more than the first signal quality in response to secondary signal quality, base station 110 determines whether the difference between the two is no more than predetermined quality threshold value.If being no more than predetermined quality threshold value, base station 110 selects the base station 120 being located on the first machine as target BS.Otherwise, the selection of base station 110 is located at base station 130 on the second machine as target BS with it.
In the case where above-mentioned prioritizing selection is performed in the case of considering the signal quality of base station, it may appear that following scene：The candidate target base station determined in step 210 includes one group of candidate target base station of the machine trustship for being different from the first machine (for discussion purposes, hereinafter referred to as first group candidate target base station) and with by one group of candidate target base station (for discussion purposes, hereinafter referred to as second group candidate target base station) of the first machine trustship.
When the optimal candidate target base station of signal quality is included in first group of candidate target base station, base station 110 can threshold value manner of comparison as described above, the optimum signal quality is subtracted each other with the optimum signal quality of second group of candidate target base station.If the difference of gained is no more than predetermined quality threshold value, base station 110 selects have the base station of optimum signal quality as target BS in second group of candidate target base station.Otherwise, base station 110 selects have the base station of optimum signal quality as target BS in first group of candidate target base station.
In accordance with an embodiment of the present disclosure, when terminal device needs switching, prioritizing selection is with base station of the source base station on uniform machinery as target BS.As described above, in handoff scenario in this machine, because source base station can be shared with target BS to computing resources such as the memory in machine, socket, message queue, fifo buffer and pipelines, it is possible to simplify handoff procedure, so as to reduce time delay.
In accordance with an embodiment of the present disclosure, any appropriate ways can be used to simplify in machine handoff procedure to reduce handover delay.A method for simplifying for example is illustrated below with reference to Fig. 3 a and 3b, wherein Fig. 3 a show conventional handover procedure, and Fig. 3 b show handoff procedure in the machine of the simplification of the one embodiment according to the disclosure.
As shown in the figure, if base station 110 is source base station, base station 120 is target BS, when switching is performed, base station 110 will send the data related to switching to base station 120, related data of present communications for example related to the terminal device 140 of switching to be performed and/or with terminal device 140 etc., and the data will be by (X2AP layers) transmission of X2 application protocol layers.As shown in Figure 3 a, in conventional handover procedure, the X2AP layer datas of base station 110 will sequentially pass through SCTP layer (SCTP layers), (IP layers) encapsulation of internet protocol layer, then be transferred to base station 120 by local winding again.At base station 120, the data also to sequentially pass through IP layers, SCTP layers, X2AP layers of decapsulation could obtain finally by base station 120.
As described above, when source base station and target BS are located on uniform machinery, above-mentioned handoff procedure can be simplified.As shown in Figure 3 b, the X2AP layer datas of base station 110 directly can be transferred to base station 120 by the memory shared.So, encapsulation and decapsulation process of the data on multiple protocol layers are eliminated, so as to reduce handover delay.
When source base station and target BS shared memory, read-write in order to avoid source base station and target BS to the shared memory is clashed, in one embodiment, source base station is when performing to shared memory execution write operation, the memory can be locked, prevent target BS from performing read operation when source base station is just to the memory write data with this, so as to avoid by reading and writing data mistake caused by read/write conflict.For example, when base station 110 will switch related data to the transmission of base station 120, a shared memory is created first, then by the memory lock.Next, during the data that base station 110 will transmit write the shared memory.After the write operation is completed, base station 110 unlocks memory, and such base station 120 just can perform read operation to the memory.
Equally, target BS to shared memory when read operation is performed, it is also possible to lock the memory, so as to avoid source base station from performing write operation when target BS is carrying out reading data manipulation, enabling avoid mistake.For example, when base station 120 will read the switching related data that base station 110 writes in shared memory, the memory is found in base station 120 first, but by the memory lock.After base station 120 completes read operation, the memory is unlocked.
It should be understood that simplifying by shared memory between source base station and target BS in machine and switching limitation is only exemplary rather than so as to lower time delay.The disclosure can also use any other modes, handover delay for example is reduced by sharing other computing resources between source base station and target BS, the example of the computing resource includes but is not limited to socket, message queue, fifo buffer and pipeline etc..
In order to effectively utilize the performance advantage switched in above-mentioned machine, in one embodiment, handover information is sent to base station migration management equipment by base station 110 after the target BS that step 220 have selected switching.The handover information can indicate any adequate information relevant with the switching, for example, indicate source base station and target BS, switching time etc..So, when needing to perform base station migration, base station migration management equipment can move to base station wherein to arrange based on the handover information largely to be had on the machine of close handoff relation with the base station.Concrete operations hereinafter with reference to Fig. 6 to base station migration management equipment are described in detail.
In accordance with an embodiment of the present disclosure, base station 110 can determine whether candidate target base station is located on uniform machinery with its own using any appropriate ways.In one embodiment, base station 110 can a station list is locally stored, including base station 110 all base stations for being arranged on machine.In the list, each base station for example can be identified with corresponding Base Station Identification (ID).Based on the list, base station 110 can distinguish the base station being located at it on uniform machinery and different machines.It should be understood that the mode of above-mentioned local maintenance list is only exemplary rather than limitation, base station 110 can determine whether candidate target base station is located on uniform machinery with its own using any other modes.The disclosure is not limited in this respect.
In order that base station 110 can effectively distinguish the base station being located at its own on uniform machinery and different machines, in one embodiment, base station 110 in response to there occurs that base station migrates on be located at machine, and can update the station list being locally stored.So, base station 110 is obtained in that newest base station distribution information so that the selection to handover-target base station is more effective and more efficient.
Fig. 4 shows the flow chart of the exemplary method 400 performed at source base station 110 in handoff procedure of the one embodiment according to the disclosure.It should be understood that method 400 can be as shown in Figure 1 communication network 100 in base station 110 implement.
As illustrated, method 400 starts from step 410, in this base station 110 in response to its institute
There occurs that base station migrates on the first machine being located at, and update the station list being locally stored.Then, in step 420, base station 110 receives neighboring cell measurement reporting from terminal device 140, including the signal quality information of the multiple adjacent base stations measured by terminal device 140.In step 430, base station 110 according to Event A3, it is determined that can be as the base station of candidate target base station in multiple adjacent base stations for including of the measurement report for being received.Next, in step 440, whether base station 110 determines the first optimal candidate target base station of signal quality in the station list being locally stored.If it is, method 400 proceeds to step 450, the first candidate target base station is selected as target BS in this base station 110.The switching in step 460, the triggering of base station 110 machine.Then, method 400 proceeds in step 470, and the mark of this time source base station of switching and target BS is sent to base station migration management equipment in this base station 110.
As shown in Figure 4, if base station 110 determines the first optimal candidate target base station of signal quality not in the station list being locally stored in step 440, method 400 proceeds to step 480, and the signal quality of which base station is optimal in the candidate target base station during this base station 110 determines to determine multiple candidate target base stations in step 430 first with base station 110 on uniform machinery.Convenient to discuss, the base station is referred to as the second candidate target base station, and the signal quality of the first candidate base station is referred to as the first signal quality, and the signal quality of the second candidate base station is referred to as secondary signal quality.Then, base station 110 subtracts each other the first signal quality with secondary signal quality, and determines whether resulting difference exceedes predetermined quality threshold value.
If determining that the difference exceedes predetermined quality threshold value in step 480, method 400 proceeds to step 450, as described above, base station 110 selects the first candidate target base station as the target BS of switching herein.Now, in step 460, the switching of the triggering of base station 110 is machinery compartment switching.If the difference is no more than predetermined quality threshold value, method 400 proceeds to step 490, and the second optimal candidate target base station of the signal quality in the station list that the selection of this base station 110 is locally stored is used as target BS.Next, method 400 also flows to step 460, switch between the switching time device of this base station 110 triggering.
Fig. 5 shows the block diagram of the base station 110 of the one embodiment according to the disclosure.
As illustrated, base station 110 includes handoff candidate determining unit 510, multiple candidate target base stations are configured to determine that, multiple candidate target base stations are included by the first candidate target base station of the first machine trustship；And switching target selection unit 520, it is configured as the target BS of from the multiple candidate target base stations candidate target base station of prioritizing selection first as switching.
In one embodiment, multiple candidate target base stations can include that, by the second candidate target base station of the second machine trustship, the second machine is different from the first machine.In this embodiment, switching target selection unit 520 can include：Receiving unit, is configured as receiving the first signal quality of the first candidate target base station and the secondary signal quality of the second candidate target base station；Comparing unit, be configured as by the first signal quality and secondary signal mass ratio compared with；Whether decision unit, is configured to respond to secondary signal quality more than the first signal quality, determine secondary signal quality with the difference of the first signal quality no more than predetermined quality threshold value；And select unit, difference is configured to respond to no more than predetermined quality threshold value, the first candidate target base station of selection is used as target BS.
In one embodiment, base station 110 can also include：Handover management element 530, is configured as the list of the base station of the first machine trustship of storage；And machine determining unit 540, it is configured as determining based on list the first candidate target base station by the first machine trustship, and the second candidate target base station is by the second machine trustship.
In one embodiment, first signal quality is the first optimum signal quality in first group of signal quality of candidate target base station by the first machine trustship, and secondary signal quality is the second optimum signal quality in second group of signal quality of candidate target base station of the machine trustship for being different from the first machine.
In one embodiment, when the first candidate target base station is targeted base station, base station 110 can also include switch unit 550.Switch unit 550 can include：Shared determining unit, is configured to determine that the computing resource shared by source base station and target BS in the first machine；And data transmission unit, it is configured with shared computing resource to transmit the data related to switching to target BS.In one embodiment, the computing resource shared can include shared memory, and data transmission unit is additionally configured to：In writing data into shared memory.In one embodiment, switch unit 550 can also include：Lock cell, was configured as before write-in is performed, the shared memory of locking；And unlocking unit, it is configured as after write-in is completed, the shared memory unblock to locking.
In one embodiment, base station 110 can also include：Transmitting element 560, is configured as sending handover information to base station migration management equipment, and handover information indicates source base station and target BS.
Fig. 6 shows the flow chart of the method 600 of the target machine for determining base station migration of the one embodiment according to the disclosure.In accordance with an embodiment of the present disclosure, method 600 can be performed by any appropriate equipment that management can be performed to base station migration.Below for discussion purposes, the equipment of execution method 600 is referred to as base station migration management equipment.The base station migration management equipment can be arranged in the communication network 100 of Fig. 1 in any suitable manner.For example, base station migration management equipment can be arranged on the machines different from the machine of trustship base station 110,120 and 130, and the machine of trustship base station migration management equipment belongs to same BBU ponds with the machine of trustship base station 110,120 and 130.Alternately, migration management equipment in base station can be arranged on certain machine in the machine of trustship base station 110,120 and 130.
As illustrated, method 600 starts from step 610, handover information is received in this base station migration management equipment.As described above, handover information can be related to certain switching of certain base station is related to, for indicating the information relevant with the switching, for example, source base station and target BS, switching time of this switching etc. are indicated.
In accordance with an embodiment of the present disclosure, migration management equipment in base station can receive the handover information from any appropriate equipment.As described above, the information can be received from source base station.Alternately example, base station migration management equipment can also receive the information from target BS.
Next, method 600 proceeds to step 620, in this base station migration management equipment when it is determined that to perform migration to certain base station, the target machine of migration is determined based on the handover information related to the base station received in step 610.Convenient to discuss, base station to be migrated is referred to as first base station.
In accordance with an embodiment of the present disclosure, migration management equipment in base station is primarily based on the handover information related to first base station for receiving, it is determined that the switching times that all base stations on another machine different from the machine of trustship first base station occur with first base station.Then, identified switching times are compared with pre-determined number threshold value.Exceed pre-determined number threshold value in response to switching times, another base station is defined as target machine.In this way, base station can be preferentially migrated to on the machine that will frequently be switched between the base station, so as to improve the possibility switched in triggering machine, and then can improve performance of handoffs, for example, reduce handover delay.
The pre-determined number threshold value can be set to any appropriate value.In one embodiment, the threshold value can be adjusted come dynamic by corresponding switching times according to determined by for different machines.For example, the threshold value can be determined based on the maximum switching times in the switching times occurred on each machine, enabling target machine will be defined as come the machine of most multiple switching between first base station.
In accordance with an embodiment of the present disclosure, migration management equipment in base station can perform the determination of switching times using any appropriate ways.In one embodiment, base station migration management equipment can determine the individual switching times occurred between any two base station, the switching times that all base stations for being then based on the individual switching times between identified any two base station to determine on first base station and certain machine occur based on the handover information for receiving.
As an example, base station migration management equipment can be locally stored a form, the switching times between the charting base station.As an example, the form can have N × N number of element T [p, q], it indicates the switching times for occurring between p-th base station and q-th base station within a predetermined period of time.
The handover information that the form can be based on receiving updates.For example, respective element T [p, q] can be increased into a pre-determined number variable.The pre-determined number variable can be set to any appropriate value.As an example, pre-determined number variable can be set to 1.
It should be understood that the use of above table is only exemplary rather than limitation.The disclosure can store the handoff relation between base station using any appropriate format, and the scope of the present disclosure is not limited in this respect.
In addition to the source base station and the corresponding relation of target BS that switch, base station migration management equipment also stores the corresponding relation of base station and machine.When base station migration management equipment determines to perform migration to j-th base station, it may be determined that the switching times that the base station on every machine occurs with the base station, the machine that the number of times exceedes pre-determined number threshold value is then defined as the target machine of base station migration.
The exemplary method 700 that base station migration management equipment determines target machine is described below with reference to Fig. 7.
As shown in the figure, in method 700, when base station migration management equipment determines to perform migration to j-th base station, determine the relevance of the base station and kth platform machine based on the switching times between all base stations of trustship on the base station and kth platform machine in step 710 first, the switching includes all switchings of j-th base station as source base station and target BS.The calculating can be performed using following equation：
Wherein Mk [l] represents l-th base station on kth platform machine, and Hj,kRepresent the relevance of j-th base station and kth platform machine.
Next, in step 720, base station migration management equipment will be defined as target machine with machine of j-th base station with most High relevancy.For example, base station migration management equipment finds out Hj, the i for meeting the following relation such as not, i.e. { Hj,1,Hj,2,…,Hj,MIn maximum：
Hj , i＞ Hj , k(k=1,2 ..., M, k ≠ i)
After base station migration management equipment determines target machine, j-th base station can be moved on i-th machine.
In accordance with an embodiment of the present disclosure, migration management equipment in base station can determine to perform migration to certain base station in any opportune moment.For example, base station migration management equipment can be when certain machine be closed for saving energy consumption, it is determined that the base station of trustship on the machine is moved on other machines.Alternately, when certain base station of trustship on certain machine turns into focus, in order to ensure the service performance of the base station, base station migration management equipment can determine to move to some base stations on this machine on other machines.
Fig. 8 shows the block diagram of the equipment 800 of the target machine for determining base station migration of the one embodiment according to the disclosure.It should be understood that equipment 800 may be embodied as migration management equipment in base station as described above.
As illustrated, equipment 800 includes：Receiving unit 810, is configured as receiving the handover information related to first base station；Switching times determining unit 820, is configured as based on received handover information, determines the switching times occurred between at least one second base stations and the first base station hosted by the second machine, and the second machine is different from the first machine；Comparing unit 830, is configured as comparing identified switching times with pre-determined number threshold value；And target machine determining unit 840, switching times are configured to respond to more than pre-determined number threshold value, the second machine is defined as target machine.
In one embodiment, at least one second base stations include multiple second base stations.In this embodiment, switching times determining unit 820 can include：Individual number of times determining unit, is configured as the individual switching times for determining to occur between each second base station in first base station and multiple second base stations based on received handover information；And sum unit, it is configured as the multiple individuality switching times summation that will be determined for multiple second base stations.
In one embodiment, equipment 800 can also include：Memory cell 850, is configured as storing the corresponding relation between base station and machine.In this example, the determination of switching times is also based on stored corresponding relation.
It should be appreciated that base station 110 and each unit described in equipment 800 are corresponding with each step in the method 200,400,600 and 700 described referring to figs. 2 to Fig. 4 and Fig. 6 and Fig. 7 respectively.Therefore, the operation and feature for being described above in association with Fig. 2 to Fig. 4 and Fig. 6 and Fig. 7 are equally applicable to base station 110 and equipment 800 and the unit for wherein including, and with same effect, detail is repeated no more.
Included unit can in various manners be realized with profit in base station 110 and equipment 800, including software, hardware, firmware or its any combination.In one embodiment, one or more units can be realized using software and/or firmware, for example, store machine-executable instruction on a storage medium.In addition to machine-executable instruction or alternatively, some or all of unit in base station 110 and equipment 800 can be realized by one or more hardware logic components at least in part.It is unrestricted as an example, the hardware logic component of the exemplary type that can be used includes field programmable gate array (FPGA), application specific integrated circuit (ASIC), application specific standard product (ASSP), on-chip system (SOC), CPLD (CPLD), etc..
In general, the various example embodiments of the disclosure can be implemented in hardware or special circuit, software, logic, or its any combinations.Some aspect can implement within hardware, and other aspect can by the firmware of controller, microprocessor or other computing devices or software in implement.When each side of embodiment of the disclosure is illustrated or described as block diagram, flow chart or is represented using some other figures, it will be understood that square frame described herein, device, system, techniques or methods can be implemented as nonrestrictive example in hardware, software, firmware, special circuit or logic, common hardware or controller or other computing devices, or in its some combination.
As an example, embodiment of the disclosure can be described in the context of machine-executable instruction, machine-executable instruction is such as included in the program module performed in the device on the true or virtual processor of target.In general, program module is including routine, program, storehouse, object, class, component, data structure etc., it performs specific task or realizes specific abstract data structure.In embodiments, the function of program module can merge or split between described program module.Machine-executable instruction for program module can be performed in local or distributed apparatus.In distributed apparatus, program module may be located in both local and remote storage mediums.
Computer program code for realizing disclosed method can be write with one or more programming language.These computer program codes can be supplied to the processor of all-purpose computer, special-purpose computer or other programmable data processing units, so that program code causes and is carried out in function/operation specified in flow chart and/or block diagram when being performed by computer or other programmable data processing units.Program code can completely on computers, part on computers, as independent software kit, part on computers and part on the remote computer or completely on remote computer or server perform.
In the context of the disclosure, machine readable media can be include or store for or be related to instruction execution system, any tangible medium of the program of device or equipment.Machine readable media can be machine-readable signal medium or machinable medium.Machine readable media can include but is not limited to electronics, magnetic, optical, electromagnetism, infrared or semiconductor system, device or equipment, or its any appropriate combination.The more detailed example of machinable medium includes electrical connection, portable computer diskette, hard disk, random access memories (RAM), read-only storage (ROM), Erasable Programmable Read Only Memory EPROM (EPROM or flash memory), light storage device, magnetic storage apparatus with one or more wire, or its any appropriate combination.
In addition, although operation is depicted with particular order, this simultaneously should not be construed and require this generic operation with the particular order that shows or completed with sequential order, or performs the operation of all diagrams to obtain expected result.In some cases, multitask or parallel processing can be beneficial.Similarly, although discussed above contain some specific implementation details, this simultaneously should not be construed as the scope of any invention of limitation or claim, and should be interpreted that the description of the specific embodiment to that can be directed to specific invention.Some features in this specification described in the context of separate embodiment can also combined implementation in single embodiment.Conversely, the various features described in the context of single embodiment discretely can also be implemented in multiple embodiments or in any suitable sub-portfolio.
Although describing theme with the language acted specific to architectural feature and/or method, but it is to be understood that theme defined in the appended claims is not limited to above-described special characteristic or action.Conversely, above-described special characteristic and action are disclosed as the exemplary forms for realizing claim.
Claims (24)
1. it is a kind of in handoff procedure at source base station selection target base station method, institute
Source base station is stated by the first machine trustship, methods described includes：
It is determined that multiple candidate target base stations, the multiple candidate target base station is including by described first
First candidate target base station of machine trustship；And
The first candidate target base station described in prioritizing selection is made from the multiple candidate target base station
It is the target BS.
2. method according to claim 1, wherein the multiple candidate target base station bag
Include by the second candidate target base station of the second machine trustship, second machine is different from described the
One machine,
Wherein described prioritizing selection includes：
The first signal quality and described second for receiving first candidate target base station are waited
Select the secondary signal quality of target BS；
By first signal quality and the secondary signal mass ratio compared with；
It is more than first signal quality in response to the secondary signal quality, it is determined that described
Whether secondary signal quality is no more than predetermined quality threshold value with the difference of first signal quality；
And
The predetermined quality threshold value is no more than in response to the difference, selects described first to wait
Target BS is selected as the target BS.
3. method according to claim 2, also includes：
Store the list of the base station of the first machine trustship；And
Determine first candidate target base station by the first machine support based on the list
Pipe, and second candidate target base station is by the second machine trustship.
4. method according to claim 2, wherein first signal quality is by institute
State the first optimal letter in first group of signal quality of candidate target base station of the first machine trustship
Number quality, and the secondary signal quality is to be different from the machine trustship of first machine
Second group of signal quality of candidate target base station in the second optimum signal quality.
5. method according to claim 1, wherein when first candidate target base station
When being confirmed as the target BS, methods described includes：
Determine the calculating shared with the target BS by the source base station in first machine
Resource；And
Shared computing resource is used related to the switching to target BS transmission
Data.
6. method according to claim 5, wherein the computing resource shared is included altogether
The memory enjoyed,
Transmitting the data related to the switching to the target BS includes：
By in the data write-in shared memory.
7. method according to claim 6, also includes：
Before said write is performed, the shared memory is locked；And
After said write is completed, the shared memory unblock to locking.
8., according to the method that any one of claim 1 to 7 is described, also include：
Handover information is sent to base station migration management equipment, wherein handover information instruction is described
Source base station and the target BS.
9. a kind of base station by the first machine trustship, including：
Handoff candidate determining unit, is configured to determine that multiple candidate target base stations, the multiple
Candidate target base station is included by the first candidate target base station of the first machine trustship；And
Switching target selection unit, is configured as preferentially being selected from the multiple candidate target base station
Select target BS of first candidate target base station as switching.
10. base station according to claim 9, wherein the multiple candidate target base station bag
Include by the second candidate target base station of the second machine trustship, second machine is different from described the
One machine, and
Wherein described switching target selection unit includes：
Receiving unit, is configured as receiving the first signal of first candidate target base station
The secondary signal quality of quality and second candidate target base station；
Comparing unit, is configured as first signal quality and the secondary signal matter
Amount compares；
Decision unit, is configured to respond to the secondary signal quality more than described first
Whether not signal quality, determine the difference of the secondary signal quality and first signal quality
More than predetermined quality threshold value；And
Select unit, is configured to respond to the difference no more than the predetermined quality threshold
Value, selects first candidate target base station as the target BS.
11. base stations according to claim 10, also include：
Handover management element, the list of the base station for being configured as storing the first machine trustship；
And
Machine determining unit, is configured as determining first candidate target based on the list
Base station is by the first machine trustship, and second candidate target base station is by second machine
Device trustship.
12. base stations according to claim 10, wherein first signal quality be by
In first group of signal quality of candidate target base station of the first machine trustship first is optimal
Signal quality, and the secondary signal quality is the machine support for being different from first machine
The second optimum signal quality in second group of signal quality of candidate target base station of pipe.
13. base stations according to claim 9, wherein when first candidate target base station
When being confirmed as the target BS, the base station also includes switch unit, and
Wherein described switch unit includes：
Shared determining unit, is configured to determine that in first machine by the source base station
The computing resource shared with the target BS；And
Data transmission unit, is configured with shared computing resource and comes to the mesh
Transmit the data related to the switching in mark base station.
14. base stations according to claim 13, wherein the computing resource shared includes
Shared memory, and the data transmission unit be additionally configured to by the data write institute
In stating shared memory.
15. base stations according to claim 14, wherein the switch unit also includes：
Lock cell, was configured as before said write is performed, and locked the shared storage
Device；And
Unlocking unit, is configured as after said write is completed, the shared storage to locking
Device is unlocked.
16., according to the described base station of any one of claim 9 to 15, also include：
Transmitting element, is configured as sending handover information, wherein institute to base station migration management equipment
State handover information and indicate the source base station and the target BS.
17. it is a kind of for determine by first base station migrate to target machine method, it is described
Method includes：
Receive the handover information related to the first base station；
Based on the handover information for being received, at least one hosted by the 3rd machine are determined
The switching times occurred between two base stations and the first base station；
Identified switching times are compared with pre-determined number threshold value；And
Exceed the pre-determined number threshold value in response to the switching times, the 3rd machine is true
It is set to the target machine.
18. methods according to claim 17, wherein described at least one second base stations
Including multiple second base stations, and
Wherein determine that the switching times include based on the handover information for being received：
Determined based on received handover information the first base station with it is the multiple
The individual switching times occurred between each second base station in second base station；And
The multiple individuality switching times summation that will be determined for the multiple second base station.
19. method according to claim 17 or 18, also includes：
Corresponding relation between storage base station and machine,
The determination of the wherein described switching times also corresponding relation based on the storage.
20. it is a kind of for determine by first base station migrate to target machine equipment, it is described
Equipment includes：
Receiving unit, is configured as receiving the handover information related to the first base station；
Switching times determining unit, is configured as based on the handover information for being received, it is determined that
What is occurred between at least one second base stations and the first base station hosted by 3rd machine cuts
Change number of times；
Comparing unit, is configured as comparing identified switching times with pre-determined number threshold value；
And
Target machine determining unit, is configured to respond to the switching times and exceedes described making a reservation for
Frequency threshold value, the target machine is defined as by the 3rd machine.
21. equipment according to claim 20, wherein described at least one second base stations
Including multiple second base stations, and
Wherein described switching times determining unit includes：
Individual number of times determining unit, is configured as based on received handover information come really
Occur between each second base station in the fixed first base station and the multiple second base station
Individual switching times；And
Sum unit, be configured as by for the multiple second base station determine it is many each and every one
Body switching times are sued for peace.
22. equipment according to claim 20 or 21, also includes：
Memory cell, is configured as storing the corresponding relation between base station and machine,
The determination of wherein described switching times is also based on stored corresponding relation.
A kind of 23. equipment for the selection target base station in handoff procedure, including：
Processor, and
Be stored with the memory of computer program instructions,
The memory and the computer program instructions are configured as together with the processor
The equipment is set to perform the method according to any one of claim 1 to 8 claim.
24. it is a kind of for determine by first base station migrate to target machine equipment, including：
Processor, and
Be stored with the memory of computer program instructions,
The memory and the computer program instructions are configured as together with the processor
The equipment is set to perform the side according to any one of claim 17 to 19 claim
Method.
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