CN101370281A - Area load control method, system and equipment - Google Patents
Area load control method, system and equipment Download PDFInfo
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- CN101370281A CN101370281A CNA2007101627091A CN200710162709A CN101370281A CN 101370281 A CN101370281 A CN 101370281A CN A2007101627091 A CNA2007101627091 A CN A2007101627091A CN 200710162709 A CN200710162709 A CN 200710162709A CN 101370281 A CN101370281 A CN 101370281A
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Abstract
The invention relates to radio communication field and discloses an area load control method, system and device, which balances the resident loads for the entire network and reduces the possibility of the access blocking. The invention processes a statistics for the quantity of the vacant terminals and balances the vacant terminals according to the quantity of the vacant terminal in the areas. The areas can be the areas of small area level and can be the areas of TA level. The core network device can balance the load for the vacant terminals and the base station can balance the load for the vacant terminals.
Description
Technical field
The present invention relates to wireless communication field, particularly load control technology.
Background technology
Universal mobile telecommunications system (Universal Mobile Telecommunications System, be called for short " UMTS ") be the 3-G (Generation Three mobile communication system) that adopts Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division MultipleAccess is called for short " WCDMA ") air interface technologies.
In the UMTS system, for ease of network side to subscriber equipment (User Equipment, be called for short " UE ") carry out mobile management, the UMTS system is divided into network a plurality of predeterminable areas in advance when the network planning, and each predeterminable area is the zone that one or more NodeB (base-station node) are covered.Predeterminable area is at circuit switching (Circuit Switching, abbreviation " CS ") corresponding lane place (Local Area on the territory, be called for short " LA "), at packet switching (Packet Switching, abbreviation " PS ") a corresponding route district (Routing Area is called for short " RA ") on the territory, LA, RA can be referred to as tracing Area (Tracking Area, be called for short " TA "), the expression network is to come the position of tracing UE in network with this position concept.Each LA has one to be used for it is carried out uniquely identified LA identification number, and is same, the also corresponding RA identification number of each RA.When the UE that is in idle condition (being non-occupied terminal) needs to carry out the sub-district gravity treatment in the process that network moves, this UE is by monitoring the broadcast on the new CBCH of selecting, obtain the LA at current area place or the identification number of RA, and the LA that is preserved with this UE itself or the identification number of RA compare, as the more new technological process of position of then initiating inequality, make network side obtain this UE latest position information.When this UE has downlink business to arrive, LA or the RA identification number registered when network side upgrades according to this UE position, all NodeB issuing page message in corresponding LA or RA scope, this UE responds network side after receiving message.UE carries out in the UMTS system, also being provided with periodical position renewing timer the renewal of position except needing in moving process, when this timer expires, also can initiate more new technological process of position.
Because at UMTS and Long Term Evolution (Long Term Evolution, abbreviation " LTE ") in the evolution process, the sub-district of different frequency layer and different radio access technologies heavily covers or becomes the situation of adjacent area more and more, also just Network Load Balance has been proposed new demand, at present, in UMTS, proposed the UE that is in active state is carried out the implementation of load balancing.
Yet the present inventor finds to have only demand and the realization of the UE that is in active state being carried out load balancing at present in UMTS, does not propose the UE that is in idle condition is carried out the implementation of load balancing as yet.And no matter be in the UMTS system, still in LTE system or other network system, reside in certain sub-district if the UE that is in idle condition too concentrates, will cause bigger resident load to this sub-district, and then cause the congested and access failure of more access, also will cause potential local resource assignment problem simultaneously.
Summary of the invention
The technical problem underlying that embodiment of the present invention will solve provides a kind of area load control method, system and equipment, makes that the resident load of each sub-district of whole network can be more balanced, has reduced and has inserted congested possibility.
For solving the problems of the technologies described above, embodiments of the present invention provide a kind of area load control method, may further comprise the steps:
Add up the number of non-occupied terminal in each zone;
The number of non-occupied terminal carries out load balancing to non-occupied terminal in each zone that obtains according to statistics.
Embodiments of the present invention also provide a kind of area load control system, comprising:
Statistic unit is used for adding up the number of each zone non-occupied terminal;
Load Balance Unit, the number that is used for each zone non-occupied terminal of obtaining according to statistic unit statistics carries out load balancing to non-occupied terminal.
Embodiments of the present invention also provide a kind of network equipment, comprising:
Statistic unit is used for adding up the number of each zone non-occupied terminal;
Load Balance Unit, the number that is used for each zone non-occupied terminal of obtaining according to statistic unit statistics carries out load balancing to non-occupied terminal.
Embodiments of the present invention also provide a kind of base station, comprising:
Receiving element is used for receiving from equipment of the core network the number of each zone non-occupied terminal;
Load Balance Unit, the number of each the zone non-occupied terminal that is used for receiving according to receiving element carries out load balancing to non-occupied terminal.
Embodiment of the present invention compared with prior art, the main distinction and effect thereof are:
Add up the number of non-occupied terminal in each zone, non-occupied terminal is carried out load balancing according to the number of add up non-occupied terminal in each zone that obtains.Since when the UE that is in idle condition (being non-occupied terminal) too concentrated reside in certain sub-district the time, will cause bigger resident load to this sub-district, and then cause more non-occupied terminal that congested and access failure takes place to insert, this also will cause potential local resource assignment problem, therefore, by number according to each regional non-occupied terminal of adding up, each regional non-occupied terminal is carried out load balancing, can make that the resident load of each sub-district of whole network can be more balanced, significantly reduced because the congested possibility of the excessive access that causes of resident load has also solved potential local resource assignment problem simultaneously.
Description of drawings
Fig. 1 is the area load control method flow chart according to first embodiment of the invention;
Fig. 2 is the area load control method flow chart according to third embodiment of the invention;
Fig. 3 is the area load control method flow chart according to four embodiment of the invention;
Fig. 4 is the area load control method flow chart by equipment of the core network initiation statistical message according to fifth embodiment of the invention;
Fig. 5 is the area load control method flow chart by base station initiation statistical message according to fifth embodiment of the invention;
Fig. 6 is the area load control method flow chart according to eighth embodiment of the invention;
Fig. 7 is the TA branch ring schematic diagram according to eighth embodiment of the invention;
Fig. 8 is the area load control method flow chart according to ninth embodiment of the invention;
Fig. 9 is the area load control method flow chart according to tenth embodiment of the invention;
Figure 10 is the area load control system structural representation according to eleventh embodiment of the invention;
Figure 11 is the area load control method flow chart according to sixth embodiment of the invention;
Figure 12 is the area load control method flow chart according to seventh embodiment of the invention;
Figure 13 is the method flow diagram that carries out area load control according to third party's entity in the ninth embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiments of the present invention are described in further detail below in conjunction with accompanying drawing.
First execution mode of the present invention relates to a kind of area load control method, in the present embodiment, from the information that the UE that is in idle condition reports, obtain the current resident area identification of this UE by equipment of the core network, and according to the area identification that is obtained, add up the number that is in the UE of idle condition in each zone, statistics is sent to the base station, be in the number of the UE of idle condition in each zone that obtains according to statistics by the base station, the UE that is in idle condition is carried out load balancing, and each zone in the present embodiment is each sub-district.
Idiographic flow as shown in Figure 1, in step 110, the UE that is in idle condition is after carrying out cell selecting or sub-district gravity treatment, send tracing section updating (Tracking Area Updating, be called for short " TAU ") message, by in this message, carrying current resident cell ID, report current resident cell ID to network side.Same domain technical staff should be understood that tracing Area TA represents that network is to come the position of tracing UE in network with this position concept TA, and route district RA, lane place LA can be commonly referred to as TA, and correspondingly, the updating message RAU of RA, LA, LAU also can be commonly referred to as TAU.Simultaneously, industry does not influence protection scope of the present invention to other definition modes of trace regions yet.
Then, enter step 120, when statistics began constantly, equipment of the core network was added up the number that is in the UE of idle condition in each sub-district.Specifically, equipment of the core network obtains the current resident cell ID of UE of each idle condition by the TAU message of the UE transmission of each idle condition.Then, oppositely shine upon, promptly add up the number that is in the UE of idle condition in each sub-district according to the cell ID that obtains.
Then, enter step 130, be in each sub-district that this equipment of the core network obtains statistics idle condition UE number and respectively be in mobility parameter and/or the CAMEL-Subscription-Information of the UE of idle condition, send to corresponding base station.For convenience of description, be that example describes with the sub-district in each sub-district 1 in the present embodiment.
Specifically, with the LTE network is example, be in the number of the UE of idle condition in the sub-district 1 that above-mentioned equipment of the core network can obtain statistics, and the mobility parameter and/or the CAMEL-Subscription-Information that respectively are in the UE of idle condition in the sub-district 1, can be by the S1 message (i.e. the message that sends by the S1 interface) that exists, such as Direct transfer message (direct-sending message) or newly-increased S1 message, send to the base station 1 under the sub-district 1, correspondingly, in the UMTS network, can send by Iu message.
Then, enter step 140, base station 1 is in the number of the UE of idle condition according in the sub-district 1 that receives, and the mobility parameter and/or the CAMEL-Subscription-Information that respectively are in the UE of idle condition in the sub-district 1, carries out load balancing.
Specifically, base station 1 is earlier according to the number that is in the UE of idle condition in the sub-district 1, and the mobility parameter and/or the CAMEL-Subscription-Information that respectively are in the UE of idle condition in the sub-district 1, the resident load of calculation plot 1.
Then, judge whether the resident load of sub-district 1 is excessive.Such as, judge whether the numerical value of the resident load of sub-district 1 surpasses thresholding, if surpass thresholding, judge that then the resident load of sub-district 1 is excessive; Perhaps, if whether the difference of judging the residue load that the resident load of sub-district 1 and sub-district 1 are current greater than thresholding, then judges the resident load of sub-district 1 excessive greater than thresholding; Perhaps, whether the difference of resident load of judging the resident load of sub-district 1 and adjacent sub-district 2 is greater than thresholding, if greater than thresholding, the resident load of then judging sub-district 1 is excessive, certainly, and in such cases, sub-district 2 also need belong to base station 1, guaranteeing that base station 1 can receive the number that is in the UE of idle condition in the sub-district 2 from equipment of the core network, and the mobility parameter and/or the CAMEL-Subscription-Information that respectively are in the UE of idle condition in the sub-district 2, thereby calculate the resident load of sub-district 2.Certainly, may also have other the whether excessive method of the resident load of judging sub-district 1, not exemplify one by one at this.
If result of determination is that the resident load of sub-district 1 is excessive, then explanation need be balanced to the UE that partly be in idle condition in other sub-district, and crossing greatly with the resident load of sub-district 1 in the present embodiment, example describes.Therefore, the part in the 1 needs selection sub-district 1, base station is in the UE of idle condition.Such as the UE that is in idle condition of a part in the sub-district 1 can be selected according to mobility parameter and/or the CAMEL-Subscription-Information of the UE that respectively is in idle condition in the sub-district 1 in base station 1.
At last, base station 1 sends the gravity treatment indication to the UE that is in idle condition that selects.Such as, base station 1 can control by Radio Resource the UE that is in idle condition that (Radio Resource Control, be called for short " RRC ") message informing selects carry out the sub-district gravity treatment (as step 140 '), realize resident load balancing control.
Be not difficult to find, because each base station all can be according to the statistics of equipment of the core network, and mobility parameter and/or the CAMEL-Subscription-Information of the UE of the idle condition that issues of equipment of the core network, carry out the control of load balancing to having jurisdiction over down each sub-district, therefore each base station is in the load balancing process, further can be with reference to the loading condition of other base stations, can make that the resident load of each sub-district of whole network can be more balanced, significantly reduced because the congested possibility of the excessive access that causes of resident load has also solved potential local resource assignment problem simultaneously.And, because being actually by the base station under this sub-district, the load balancing of each sub-district controls, therefore can alleviate the load of equipment of the core network.
Second execution mode of the present invention relates to a kind of area load control method, and the present embodiment and first execution mode are roughly the same, and its difference is, in the first embodiment, is the control of being carried out load balancing by the base station; And in the present embodiment, be the control of carrying out load balancing by equipment of the core network.
Specifically, after equipment of the core network counts the number of the UE that is in idle condition in each sub-district, according to the number of the UE that is in idle condition in each sub-district with respectively be in mobility parameter and/or the CAMEL-Subscription-Information of the UE of idle condition, carry out load balancing.Be that example describes still below with sub-district 1.
By the resident load of equipment of the core network calculation plot 1 and judge whether the resident load of sub-district 1 is excessive, concrete computational methods and determination methods are identical with computational methods and determination methods in first execution mode, do not repeat them here.In result of determination is the resident load of sub-district 1 when excessive, and this equipment of the core network can be selected the UE that is in idle condition of a part in the sub-district 1 according to mobility parameter and/or the CAMEL-Subscription-Information of the UE that respectively is in idle condition in the sub-district 1.Then, the UE that is in idle condition that selects is notified to base station 1 under the sub-district 1, to the UE that is in idle condition that selects, sends the gravity treatment indication by base station 1.Such as the sub-district gravity treatment can be carried out by the UE that is in idle condition that the RRC message informing is selected in base station 1.
Because in the present embodiment, be the control of carrying out load balancing by equipment of the core network, the base station only need receive the UE information that needs that this equipment of the core network selects carry out the sub-district gravity treatment, therefore between equipment of the core network and base station, need not to transmit again mobility parameter and/or the CAMEL-Subscription-Information of each UE that is in idle condition, saved network transmission resource.
The 3rd execution mode of the present invention relates to a kind of area load control method, the present embodiment and first execution mode are roughly the same, its difference is, in the first embodiment, equipment of the core network is according to being in the UE of idle condition after cell selecting or sub-district gravity treatment, to the TAU message that network side sends, add up the UE number that is in idle condition in each sub-district; And in the present embodiment, equipment of the core network is the TAU message that periodically sends according to the UE that is in idle condition, adds up the UE number that is in idle condition in each sub-district.
Specifically, as shown in Figure 2, in step 210, the UE that is in idle condition periodically sends TAU message to equipment of the core network, carries current resident cell ID and the mobility parameter of this UE in this TAU message.Wherein, the mobility parameter of UE comprises the indication that whether enters current measurement period, or the frequency of sub-district gravity treatment etc.
Such as, if the UE that is in idle condition knows the length and the zero-time of measurement period in advance, then in the mobility parameter that can in TAU message, carry, whether comprise the indication that whether enters current measurement period, so that equipment of the core network can be included this UE in the current measurement period in according to this indication decision.Network side can pass through RRC message (as broadcast channel (Broadcast Channel, be called for short " BCH ") message), or other method, and the length and the zero-time of measurement period is notified to UE.
Again such as, be in the mobility parameter that the UE of idle condition can carry in TAU message, the frequency that comprises the sub-district gravity treatment so that equipment of the core network can be according to the translational speed of this UE of this frequency computation part, and then judges whether count this UE in current measurement period.
Equipment of the core network can return the response message that this TAU is correctly received in an expression to this UE after receiving the TAU message that the UE that is in idle condition sends, as step 210 '.
Then, in step 220, equipment of the core network is added up the number that is in the UE of idle condition in each sub-district in a measurement period.Specifically, the TAU message that equipment of the core network can periodically send according to the UE of each idle condition is added up the number that is in the UE of idle condition in each sub-district in the current measurement period.
What deserves to be mentioned is, present embodiment is to describe with the example that is controlled to be of being carried out load balancing by the base station, in actual applications, also can carry out the control of load balancing by equipment of the core network, this moment, the base station only need receive the UE information that needs that this equipment of the core network selects carry out the sub-district gravity treatment, therefore between equipment of the core network and base station, need not to transmit again mobility parameter and/or the CAMEL-Subscription-Information of each UE that is in idle condition, saved network transmission resource.The specific implementation and second execution mode are similar, do not repeat them here.
The 4th execution mode of the present invention relates to a kind of area load control method, the present embodiment and first execution mode are roughly the same, its difference is, in the first embodiment, the UE that is in idle condition sends the TAU message of carrying current resident cell ID only after carrying out cell selecting or sub-district gravity treatment; And in the present embodiment, the UE that is in idle condition is not only after carrying out cell selecting or sub-district gravity treatment, the TAU message of current resident cell ID is carried in transmission, also need periodically to send TAU message, periodically in the TAU message that sends, carry current resident cell ID and the mobility parameter of this UE.Wherein, the mobility parameter of this UE can comprise the indication that whether enters current measurement period, or the frequency of sub-district gravity treatment etc.
Equipment of the core network according to the TAU message of the UE that is in idle condition in TAU message of carrying out sending after cell selecting or the sub-district gravity treatment and periodicity transmission, is added up the UE number that is in idle condition in each sub-district a statistics constantly.Then statistics is sent to corresponding base station, be in the number of the UE of idle condition in each sub-district that obtains according to statistics by the base station, the UE that is in idle condition is carried out load balancing, as shown in Figure 3.
Whether because the UE that is in idle condition moves to behind the no overlay area can't the informing network side, and this moment, equipment of the core network can be by the TAU message that periodically sends, determining needs this UE is counted in the statistics.Therefore, present embodiment has further guaranteed to be in each sub-district the UE number accuracy of idle condition on the basis of first execution mode.
The 5th execution mode of the present invention relates to a kind of area load control method, the present embodiment and first execution mode are roughly the same, its difference is, in the first embodiment, equipment of the core network is when statistics begins constantly, after cell selecting or sub-district gravity treatment,, add up the UE number that is in idle condition in each sub-district according to the UE that is in idle condition to the TAU message that network side sends; And in the present embodiment, be when statistics begins constantly, send the message that request reports current resident cell ID to the UE that is in idle condition, equipment of the core network is added up the UE number that is in idle condition in each sub-district according to respectively being in the response of the UE of idle condition to this request message.
Specifically, can be by equipment of the core network in measurement period zero hour, by the S1 interface---in the UMTS network, then by the Iu interface---initiate the message that statistics is in the UE number of idle condition, by each corresponding base station on the sub-district under it by RRC message or other message, will report the forwards of current resident cell ID to give each UE from the request of this equipment of the core network.After the UE that respectively is in idle condition receives this request message, can current resident cell ID be reported network side by response message, as shown in Figure 4, flow process afterwards is identical with first execution mode, does not repeat them here.
Perhaps, can be by each base station in measurement period zero hour, on the sub-district under it,, report the message of current resident cell ID to send to each UE request by RRC message or other message.After the UE that respectively is in idle condition receives this request message, can current resident cell ID be reported network side by response message, as shown in Figure 5, flow process afterwards is identical with first execution mode, does not repeat them here.
Need to prove, in the respective embodiments described above, the UE that respectively is in idle condition sends to equipment of the core network directly or indirectly with current resident cell ID, is added up by equipment of the core network, but also can add up in actual applications, by certain base station or third party's entity.Such as, the UE that respectively is in idle condition sends to the base station by cell update (Cell Update) message with current resident cell ID, each base station is notified to the base station of adding up by the X2 message between the base station with the load information of each sub-district under this base station, or by and third party's entity between connection message the load information of each sub-district under this base station is notified to this third party's entity.Specific implementation and the respective embodiments described above are similar, do not repeat them here.
In addition, the UE that is in idle condition can not carry the cell ID of current persistent district yet in the TAU message that periodically sends, added up and the UE that is in idle condition is carried out load balancing by the base station, specific implementation will describe in the 6th and the 7th execution mode below.
The 6th execution mode of the present invention relates to a kind of area load control method, in the present embodiment, the UE that is in idle condition periodically sends TAU message to equipment of the core network, but in this TAU message, do not carry the cell ID of current persistent district, add up the UE number that is in idle condition in the same TA in each sub-district by the base station, and then, carry out load balancing according to the UE number of adding up that is in idle condition.
Specifically, as shown in figure 11, the UE that is in idle condition periodically sends TAU message to equipment of the core network, does not carry current resident cell ID in this TAU message.This TAU message need send to equipment of the core network by the transparent transmission of base station.Equipment of the core network sends the TAU Indication message that TAU message is received in expression to relevant base station after receiving this TAU message.Owing to be in this TAU message that the UE of idle condition periodically sends, it for the base station transparent transmission, therefore the base station TAU message that can't send the UE that is in idle condition is added up, and needs the assistance of equipment of the core network, realizes the statistics to the UE that is in idle condition.Wherein, equipment of the core network can pass through S1 message, and---the UMTS network is then by Iu message---such as direct-sending message or other S1 message, sends to relevant base station with the TAU Indication message.
Such as, being in the TAU message that the UE1 of idle condition periodically sends to equipment of the core network, this TAU message need pass through equipment of the core network by the base station (as base station 1) under the current resident sub-district of UE1.That is to say, UE1 needs to initiate to set up the RRC connection requests to base station 1 earlier, connects by the RRC that sets up then TAU message is sent to base station 1, and base station 1 is after receiving this TAU message, by be connected (as connecting 1) of equipment of the core network, this TAU message is sent equipment of the core network.Equipment of the core network after receiving this TAU message, can by with this base station 1 between be connected 1, the TAU Indication message of the TAU message of UE1 is received in expression, be carried on S1---the UMTS network is then by Iu message---sends to base station 1 in the message.Certainly, can also carry the ability of UE1 and/or user's CAMEL-Subscription-Information in this TAU Indication message, perhaps, (equipment of the core network can be according to the ability of UE1 and/or user's CAMEL-Subscription-Information to carry the grade of UE1 in this TAU Indication message, determine the grade of UE1), perhaps in this TAU Indication message, carrying UE1 international mobile subscriber identity IMSI (International Mobile SubscriberIdentity) or Temporary Mobile Subscriber Identity TMSI (Temporary Mobile SubscriberIdentifier).
When finish in Measuring Time the base station, just can be according to the TAU Indication message of receiving from equipment of the core network, calculate non-occupied terminal number (promptly being in the UE number of idle condition) in the single subdistrict by following formula:
The Measuring Time of the non-occupied terminal number in the single subdistrict=(TAU Indication message * non-occupied terminal reports the cycle time of current resident cell ID)/non-occupied terminal number
Then, the base station can get access to the UE number that is in idle condition of each sub-district under other base station in the TA by the X2 message between base station and the base station, thereby realizes the control of load balancing.Specific implementation and the respective embodiments described above are similar, do not repeat them here.
Need to prove, in a TA, can be responsible for the unified load information that receives under each base station by X2 message by certain base station, and the non-occupied terminal in each sub-district under each base station carried out load balancing, also can between the base station, carry out distributed treatment by X2, promptly by each base station respectively by with the information interaction of other base station, the non-occupied terminal in the sub-district under this base station is carried out load balancing.Such as, when the Measuring Time of non-occupied terminal finishes, each base station sends the non-occupied terminal number of its estimated following sub-district to other interior base stations of same TA, load balancing will be carried out to the non-occupied terminal in the sub-district under this base station respectively according to the different loads situation under own and other base stations in each base station.In addition, network side can trigger the load balancing in the TA according to Operation and Maintenance information.Such as, in Operation and Maintenance information, comprise certain specific date or time, when reaching this specific date or time, trigger the load balancing in the TA.
The 7th execution mode of the present invention relates to a kind of area load control method, present embodiment and the 6th execution mode are roughly the same, and its difference is, in the 6th execution mode, non-occupied terminal number in the single subdistrict is added up according to the TAU Indication message of receiving from equipment of the core network in the base station; And in the present embodiment, non-occupied terminal number in the single subdistrict is added up according to the RRC connection request message of receiving of carrying the specific reasons value from UE in the base station.
Specifically, as shown in figure 12,, need therefore before sending this TAU message, need to initiate to set up the RRC connection requests to the base station earlier by the transparent transmission of base station owing to be in the TAU message that the UE of idle condition periodically sends to equipment of the core network.
In the present embodiment, the UE that is in idle condition was preparing before equipment of the core network sends the TAU message of carrying current resident cell ID, the first base station under current resident sub-district, the RRC connection requests is set up in initiation, and the cause value of this RRC connection request is set to the particular value that indication cycle sends TAU message.
When finish in the Measuring Time of non-occupied terminal the base station, can add up non-occupied terminal number in the single subdistrict by following formula according to the RRC connection request message of receiving of carrying the specific reasons value from UE:
The Measuring Time of the non-occupied terminal number in the single subdistrict=(the RRC connection request message * non-occupied terminal that carries the specific reasons value reports the cycle time of current resident cell ID)/non-occupied terminal number
Certainly, the base station also can---the UMTS network is then by Iu message---obtain the ability of each non-occupied terminal and/or user's CAMEL-Subscription-Information by S1 message from equipment of the core network, perhaps,---the UMTS network is then by Iu message---obtains the grade of each non-occupied terminal from equipment of the core network by S1 message, and the grade of each non-occupied terminal can be determined according to the ability of this non-occupied terminal and/or user's CAMEL-Subscription-Information by equipment of the core network.
Then, the base station can get access to the UE number that is in idle condition of each sub-district under other base station in the TA by the X2 message between base station and the base station, thereby realizes the control of load balancing.Specific implementation and the respective embodiments described above are similar, do not repeat them here.
The respective embodiments described above have been set forth the load control method of cell-level, will describe the load control method of TA level below in detail, and a TA comprises at least one sub-district.
The 8th execution mode of the present invention relates to a kind of area load control method, in the present embodiment, adds up the UE number that is in idle condition in each TA by equipment of the core network, and according to statistics the UE that is in idle condition in each TA is carried out load balancing.
Idiographic flow as shown in Figure 6, in step 610, equipment of the core network is added up the UE number that is in idle condition in each TA according to the TAU message that the UE that is in idle condition periodically sends.Specifically, in the present embodiment, the UE that is in idle condition will periodically send TAU message, carry the current resident TA sign of this UE in this TAU message.Equipment of the core network according to the TAU message that the UE that is in idle condition periodically sends, is added up the UE number that is in idle condition in each TA in the zero hour of a measurement period.
Then, in step 620, equipment of the core network carries out the judgement of load balancing according to statistics to the UE that is in idle condition in each TA.Wherein, the judgement of load balancing refers to equipment of the core network and determines which UE is the UE that need be balanced to other TA.That is to say that in this step, equipment of the core network need calculate the resident load of each TA according to statistics, for the excessive TA of resident load, needing which UE among this TA of decision is the UE that need be balanced to other TA.
Be that example describes with the judgement of the UE that is in idle condition in the TA1 being carried out load balancing below.
Equipment of the core network elder generation is according to the number of the UE that is in idle condition among the TA1, and the mobility parameter and/or the CAMEL-Subscription-Information that respectively are in the UE of idle condition among the TA1, the resident load of calculating TA1.Whether the resident load of judging TA1 then is excessive, judges in the concrete judgment mode and first execution mode that whether excessive the resident load of sub-district 1 mode identical, do not repeat them here.If the resident load of TA1 is excessive, then the UE that is in idle condition in the TA1 is carried out the judgement of load balancing.
Though equipment of the core network can't be known the UE number that is in idle condition of cell-level,, equipment of the core network can carry out the judgement of load balancing according to the neighbouring relations of each TA and the geographical location information of each sub-district in the TA.Such as if the load of TA1 is higher, and the load of TA2 is lower, and then equipment of the core network will determine the inner UE that is in idle condition that divides of TA1 is balanced among the TA2.
Specifically, sub-district in the TA1 can be divided into peripheral cell and center cell two parts, or according to the size of TA, be divided into a plurality of sub-districts ring, in first balanced cycle, select the interior UE that is in idle condition of peripheral cell of TA1, be balanced to UE among the TA2 as needs, if in second balanced cycle, the load of TA1 has been reduced to normal degree, then finishes; If in second balanced cycle, the load of TA1 is not reduced to normal degree as yet, then the UE that is in idle condition with center cell is balanced in the peripheral cell of this TA1, and the UE that is in idle condition with peripheral cell is balanced among the TA2, as shown in Figure 7 again.
Then, in step 630, the class information that the needs that equipment of the core network will determine are balanced to UE ratio among the TA2 and/or UE is issued on the base station under corresponding peripheral cell or the center cell.
Then, in step 640, send the gravity treatment indication to the UE that is in idle condition of needs equilibrium, indicate these UE to carry out the sub-district gravity treatment by the base station.
Need to prove, in the present embodiment, equipment of the core network be will decision the needs class information that is balanced to UE ratio among the TA2 and/or UE be issued on the base station under corresponding peripheral cell or the center cell, send the gravity treatment indication by the base station to the UE that is in idle condition of needs equilibrium, indicate these UE to carry out the sub-district gravity treatment.But in actual applications, also can directly send the gravity treatment indication by Non-Access Stratum (Non Access Stratum is called for short " NAS ") message to the UE that is in idle condition of needs equilibrium, indicate these UE to carry out the sub-district gravity treatment by equipment of the core network.
Be not difficult to find that embodiments of the present invention not only can realize the control of the load balancing of cell-level, can also realize the control of the load balancing of TA level.
The 9th execution mode of the present invention relates to a kind of area load control method, present embodiment and the 8th execution mode are roughly the same, its difference is, in the 8th execution mode, equipment of the core network is the TAU message that periodically sends according to the UE that is in idle condition, counts the UE number that is in idle condition in each TA in the zero hour of a measurement period; And in the present embodiment, by the zero hour of equipment of the core network at a measurement period, send request to the UE that is in idle condition and report current resident TA sign,, add up the UE number that is in idle condition among each TA according to the response of the UE that respectively is in idle condition to this request message.
As shown in Figure 8,, initiate the message that statistics is in the UE number of idle condition, promptly send the message that request reports current resident TA sign to the UE that respectively is in idle condition by NAS message by the zero hour of equipment of the core network at a measurement period.Certainly, this message also can---the UMTS network is then by Iu interface---sends to the base station, be transmitted by the base station earlier by the S1 interface.
After the UE that respectively is in idle condition receives this request message, can current resident TA sign be reported network side by response message.Such as, can directly this response message be sent to equipment of the core network by NAS message, also this response message can be carried on the RRC message and be forwarded to equipment of the core network via the base station.
By the response message of equipment of the core network according to the UE that respectively is in idle condition that receives, add up the UE number that is in idle condition among each TA, and the UE that is in idle condition in each TA is carried out load balancing according to statistics, concrete mode duplicates with the 8th execution mode, does not repeat them here.
What deserves to be mentioned is, in the present embodiment with add up by equipment of the core network with load balancing be that example describes, but in actual applications, also can add up and load balancing by third party's entity, the specific implementation present embodiment is identical, does not repeat them here.Wherein, third party's entity refers to other network entity of non-core net equipment or base station.For example, be example with the radio network controller (RNC), as shown in figure 13, equipment of the core network is after the TAU message of receiving the UE transmission that is in idle condition, can by with this RNC between be connected, expression is received be carried on the TAU Indication message of the TAU message of UE in the Iu message and send to RNC.Certainly, can also carry the ability of UE and/or user's CAMEL-Subscription-Information in this TAU Indication message, perhaps, in this TAU Indication message, carry the grade (equipment of the core network can be determined the grade of UE according to the ability of UE1 and/or user's CAMEL-Subscription-Information) of UE.When RNC finishes in Measuring Time, just can be according to the TAU Indication message of receiving from equipment of the core network, calculate non-occupied terminal number (promptly being in the UE number of idle condition) in the single subdistrict by following formula:
The Measuring Time of the non-occupied terminal number in the single subdistrict=(TAU Indication message * non-occupied terminal reports the cycle time of current resident cell ID)/non-occupied terminal number.Then, RNC can get access to the UE number that is in idle condition of each sub-district under other RNC in the TA by the Iur message between RNC and the RNC, thereby realizes the control of load balancing, specific implementation and the respective embodiments described above are similar, do not repeat them here.
The tenth execution mode of the present invention relates to a kind of area load control method, present embodiment and the 8th execution mode are roughly the same, its difference is, in the 8th execution mode, equipment of the core network is the TAU message that periodically sends according to the UE that is in idle condition, counts the UE number that is in idle condition in each TA in the zero hour of a measurement period; And in the present embodiment, equipment of the core network not only can be added up according to the TAU message that the UE that is in idle condition periodically sends, can also be when TA to upgrade according to the UE that is in idle condition, and the TAU message of transmission is added up.And, when equipment of the core network carries out load balancing, the UE of need equilibrium and the target TA of this UE can also be associated, and with the target TA of association by TAU ACCEPT (TAU acceptance) or ATTACH ACCEPT (adhering to acceptance) message, be notified to UE.Such as, needing balanced UE is UE1, the target TA related with this UE1 is TA1, equipment of the core network can be carried at the sign of TA1 in TAU ACCEPT or the ATTACH ACCEPT message, send to UE1, UE1 carries out TA according to the sign of this TA1 and upgrades, as shown in Figure 9 after receiving the sign of this TA1.Certainly, equipment of the core network can be carried at the sign of TA1 S1 message, and---the UMTS network is then by Iu message---sends to the base station, by RRC message the sign of this TA1 is sent to UE1 by the base station.
The 11 execution mode of the present invention relates to a kind of area load control system, as shown in figure 10, comprising: statistic unit is used for adding up the UE number that each zone is in idle condition; Load Balance Unit is used for adding up the UE number that each zone that obtains is in idle condition according to statistic unit, and the UE that is in idle condition is carried out load balancing.Make that the resident load of each sub-district of whole network can be more balanced, significantly reduced because the congested possibility of the excessive access that causes of resident load has also solved potential local resource assignment problem simultaneously.Wherein, each zone can be each sub-district, also can be each TA.
The Load Balance Unit of present embodiment may further include following subelement:
Computation subunit is used for adding up the UE number that each zone that obtains is in idle condition according to statistic unit, calculates the resident load in each zone.What deserves to be mentioned is, the UE number that is in idle condition in each zone that this computation subunit not only can obtain according to statistics carries out the calculating of resident load, can also carry out the calculating of resident load according to the mobility parameter and/or the CAMEL-Subscription-Information that respectively are in the UE of idle condition.
The chooser unit is used for selecting the part in the excessive zone of resident load to be in the UE of idle condition.What deserves to be mentioned is that the UE that is in idle condition of a part in the excessive zone of resident load can be selected according to mobility parameter and/or the CAMEL-Subscription-Information of the UE that respectively is in idle condition in this chooser unit.
The indication subelement is used to indicate the selected UE gravity treatment that is in idle condition to arrive other zone.
Statistic unit in the present embodiment and Load Balance Unit can all be arranged in equipment of the core network, in the indication subelement in Load Balance Unit, can further comprise the notice subelement, be used for the selected UE that is in idle condition in chooser unit is notified to the base station.In the base station, can comprise: Transmit-Receive Unit, be used for the notice of reception notification subelement, and according to this notice to the selected UE that respectively is in idle condition, send the gravity treatment indication.
Perhaps, the statistic unit in the present embodiment is arranged in equipment of the core network, and Load Balance Unit is arranged in the base station.At this moment, equipment of the core network also comprises and issues the unit, be used for and will respectively be in mobility parameter and/or the CAMEL-Subscription-Information of the UE of idle condition, and the UE number that is in idle condition in each zone of statistic unit statistics, send to corresponding base station.
Perhaps, statistic unit in the present embodiment and Load Balance Unit also can all be arranged in the base station.
Perhaps, statistic unit in the present embodiment and Load Balance Unit also can be arranged in radio network controller (RNC).
In sum, in embodiments of the present invention, add up the number of non-occupied terminal in each zone, non-occupied terminal is carried out load balancing according to the number of add up non-occupied terminal in each zone that obtains.Since when the UE that is in idle condition (being non-occupied terminal) too concentrated reside in certain sub-district the time, will cause bigger resident load to this sub-district, and then cause more non-occupied terminal that congested and access failure takes place to insert, this also will cause potential local resource assignment problem, therefore, by number according to each regional non-occupied terminal of adding up, each regional non-occupied terminal is carried out load balancing, can make that the resident load of each sub-district of whole network can be more balanced, significantly reduced because the congested possibility of the excessive access that causes of resident load has also solved potential local resource assignment problem simultaneously.
Each zone can be the zone of cell-level, can be the zone of TA level also, makes embodiments of the present invention to realize flexibly.
Can carry out load balancing to non-occupied terminal by equipment of the core network, also can carry out load balancing to non-occupied terminal by the base station.Because in the process of carrying out load balancing, need use the mobility parameter and/or the CAMEL-Subscription-Information of each non-occupied terminal, therefore, if adopt first kind of scheme, can avoid equipment of the core network with the step that the mobility parameter and/or the CAMEL-Subscription-Information of each non-occupied terminal sends to the base station, save transfer resource; If adopt second kind of scheme, can share the operation of equipment of the core network by each base station, alleviated the load of equipment of the core network.
Network side can get access to the current resident cell ID of non-occupied terminal by send the message that request reports current resident cell ID to non-occupied terminal; Also can be after cell selecting or sub-district gravity treatment by non-occupied terminal, initiatively report current resident cell ID to network side, and/or, periodically report current resident cell ID to network side, for how network side gets access to the current resident cell ID of non-occupied terminal, provide multiple possible implementation.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (27)
1. an area load control method is characterized in that, may further comprise the steps:
Add up the number of non-occupied terminal in each zone;
The number of non-occupied terminal carries out load balancing to non-occupied terminal in each zone that obtains according to described statistics.
2. area load control method according to claim 1 is characterized in that, described zone is sub-district or tracing Area TA.
3. area load control method according to claim 1 is characterized in that, described step of carrying out load balancing comprises following substep:
The number of non-occupied terminal in each the described zone that obtains according to described statistics calculates the resident load in each described zone;
Select the part non-occupied terminal in the excessive zone of described resident load;
Indicate selected described non-occupied terminal gravity treatment to other zone.
4. area load control method according to claim 3 is characterized in that,
In the step of the resident load in each zone of described calculating, not only the number of non-occupied terminal in each zone that obtains according to described statistics also according to the relevant information of each non-occupied terminal, carries out the calculating of described resident load;
And/or
In the step of the part non-occupied terminal in the excessive zone of the resident load of described selection,, select the part non-occupied terminal in the excessive zone of resident load according to the relevant information of each non-occupied terminal;
The relevant information of described each non-occupied terminal comprises one of following or its combination in any:
The grade of mobility parameter, CAMEL-Subscription-Information, non-occupied terminal.
5. area load control method according to claim 3 is characterized in that, the number of non-occupied terminal in each zone of described statistics, non-occupied terminal is carried out the step of load balancing, carries out by equipment of the core network;
Described equipment of the core network indicates selected non-occupied terminal gravity treatment as follows to other regional mode:
Selected non-occupied terminal is notified to the base station;
After described notice was received in described base station, each non-occupied terminal of selecting to described equipment of the core network sent the gravity treatment indication.
6. area load control method according to claim 3 is characterized in that, the step of the number of non-occupied terminal is carried out by equipment of the core network in each zone of described statistics;
Described non-occupied terminal is carried out the step of load balancing, carry out by the base station;
The step of the number of non-occupied terminal in each zone of described statistics, and between the step of the resident load in each zone of described calculating, further comprising the steps of:
The number of non-occupied terminal and the relevant information of each non-occupied terminal send to corresponding base station in each zone that described equipment of the core network will be added up.
7. area load control method according to claim 3 is characterized in that, described zone is TA; Described method is further comprising the steps of:
Mode with ring is divided the sub-district in each TA;
In the step of the part non-occupied terminal in the excessive zone of the resident load of described selection, the preferential non-occupied terminal of selecting to be in the outer shroud sub-district is if no non-occupied terminal in the outer shroud sub-district then is balanced to the non-occupied terminal in the interior ring sub-district in the outer shroud sub-district.
8. area load control method according to claim 1 is characterized in that, and is before the step of the number of non-occupied terminal, further comprising the steps of in each zone of described statistics:
Send the message that request reports current resident area identification to non-occupied terminal;
After non-occupied terminal is received described message, report current resident area identification;
In the step of the number of non-occupied terminal,, add up the number of non-occupied terminal in each zone in each zone of described statistics according to the area identification that obtains.
9. area load control method according to claim 1 is characterized in that, and is before the step of the number of non-occupied terminal, further comprising the steps of in each zone of described statistics:
Non-occupied terminal reports current resident area identification;
From the information that described non-occupied terminal reports, obtain the current resident area identification of this non-occupied terminal;
In the step of the number of non-occupied terminal,, add up the number of non-occupied terminal in each zone in each zone of described statistics according to the area identification that obtains.
10. area load control method according to claim 9 is characterized in that,
It is one of following that the described mode that reports area identification comprises at least:
Non-occupied terminal reports current resident cell ID to network side after cell selecting or sub-district gravity treatment;
Non-occupied terminal reports current resident TA sign to network side after TA upgrades;
Non-occupied terminal periodically reports current resident sub-district or TA sign to network side.
11., it is characterized in that described non-occupied terminal reports in the step of current resident area identification, comprises following substep according to claim 9 or 10 described area load control methods:
Non-occupied terminal sends tracing section updating TAU message to network side, carries current resident area identification in this message.
12. area load control method according to claim 1 is characterized in that,
The number of non-occupied terminal in each zone of described statistics, non-occupied terminal is carried out the step of load balancing, carry out by radio network controller.
13. area load control method according to claim 1 is characterized in that,
The number of non-occupied terminal in each zone of described statistics, non-occupied terminal is carried out the step of load balancing, carry out by the base station.
14. area load control method according to claim 13 is characterized in that,
Before the step of idle terminal number, further comprising the steps of in each zone of described statistics:
Described non-occupied terminal periodically sends TAU message to equipment of the core network;
Described equipment of the core network receives that with expression the TAU Indication message of TAU message sends to relevant base station.
15. area load control method according to claim 14 is characterized in that, described expression is received in the TAU Indication message of TAU message and is carried UE international mobile subscriber identity IMSI or Temporary Mobile Subscriber Identity TMSI.
16. area load control method according to claim 13 is characterized in that, described zone is the sub-district;
Before the step of idle terminal number, further comprising the steps of in each zone of described statistics:
Described non-occupied terminal is periodically before equipment of the core network sends TAU message, base station under current resident sub-district initiates to set up the radio resource control RRC connection requests, and the cause value that should ask is set to the particular value of the transmission TAU of indication cycle message.
17. area load control method according to claim 13 is characterized in that, the number of non-occupied terminal is added up by following formula in described each zone:
The Measuring Time of the non-occupied terminal number in the single subdistrict=(Indication message * non-occupied terminal sends the cycle time of TAU message)/non-occupied terminal number
Wherein, Indication message is the TAU Indication message of receiving from described equipment of the core network, or the RRC connection request message from described non-occupied terminal for receiving, the cause value of this RRC connection request message is set to the particular value that indication cycle sends TAU message.
18. area load control method according to claim 13 is characterized in that, in the described step of non-occupied terminal being carried out load balancing, comprises following substep:
By single base station by with the information interaction of other base station, the non-occupied terminal in each sub-district under each base station is carried out load balancing; Perhaps,
Each base station respectively by with the information interaction of other base station, the non-occupied terminal in the sub-district under this base station is carried out load balancing.
19. area load control method according to claim 1 is characterized in that, and is further comprising the steps of:
According to Operation and Maintenance information, trigger the step of idle terminal number in each zone of described statistics.
20. an area load control system is characterized in that, comprising:
Statistic unit is used for adding up the number of each zone non-occupied terminal;
Load Balance Unit, the number that is used for each zone non-occupied terminal of obtaining according to described statistic unit statistics carries out load balancing to non-occupied terminal.
21. area load control system according to claim 20 is characterized in that, described zone is sub-district or TA.
22. area load control system according to claim 20 is characterized in that, described Load Balance Unit comprises following subelement:
Computation subunit is used for the number of each zone non-occupied terminal of obtaining according to described statistic unit statistics, calculates the resident load in each zone;
The chooser unit is used for selecting the part non-occupied terminal in the excessive zone of resident load;
The indication subelement is used to indicate selected non-occupied terminal gravity treatment to other zone.
23. area load control system according to claim 22 is characterized in that, and is described
Statistic unit and Load Balance Unit all are arranged in equipment of the core network, and the indication subelement in the described Load Balance Unit further comprises following subelement:
The notice subelement is used for the selected non-occupied terminal in described chooser unit is notified to the base station;
Described base station comprises: Transmit-Receive Unit is used to receive the notice of described notice subelement, and sends gravity treatment indication according to this notice to selected each non-occupied terminal.
24. area load control system according to claim 20 is characterized in that described statistic unit is arranged in equipment of the core network, described Load Balance Unit is arranged in the base station;
Described equipment of the core network also comprises and issues the unit, is used for the number with non-occupied terminal in each zone of the relevant information of each non-occupied terminal and described statistic unit statistics, sends to corresponding base station.
25. a network equipment is characterized in that, comprising:
Statistic unit is used for adding up the number of each zone non-occupied terminal;
Load Balance Unit, the number that is used for each zone non-occupied terminal of obtaining according to described statistic unit statistics carries out load balancing to non-occupied terminal.
26. the network equipment according to claim 25 is characterized in that,
The described network equipment is base station or equipment of the core network.
27. a base station is characterized in that, comprising:
Receiving element is used for receiving from equipment of the core network the number of each zone non-occupied terminal;
Load Balance Unit, the number of each the zone non-occupied terminal that is used for receiving according to described receiving element carries out load balancing to non-occupied terminal.
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| CN2007101627091A CN101370281B (en) | 2007-08-15 | 2007-09-27 | Area load control method, system and equipment |
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| CN2007101627091A CN101370281B (en) | 2007-08-15 | 2007-09-27 | Area load control method, system and equipment |
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| CN110958651A (en) * | 2018-09-26 | 2020-04-03 | 成都鼎桥通信技术有限公司 | Core network reselection method and device |
| CN110958651B (en) * | 2018-09-26 | 2022-06-14 | 成都鼎桥通信技术有限公司 | Core network reselection method and device |
| CN113347668A (en) * | 2020-02-18 | 2021-09-03 | 大唐移动通信设备有限公司 | Load balancing method and device, electronic equipment and storage medium |
| CN113347668B (en) * | 2020-02-18 | 2022-07-22 | 大唐移动通信设备有限公司 | Load balancing method and device, electronic equipment and storage medium |
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