CN103249094B - A kind of load equalization method and system - Google Patents
A kind of load equalization method and system Download PDFInfo
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- CN103249094B CN103249094B CN201210025119.5A CN201210025119A CN103249094B CN 103249094 B CN103249094 B CN 103249094B CN 201210025119 A CN201210025119 A CN 201210025119A CN 103249094 B CN103249094 B CN 103249094B
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Abstract
The invention discloses a kind of load equalization method and system, the first system in the present invention can be that its operational cell obtains the current loads information of each Target cell in second system；And according to the current loads information updating Target cell load list of each Target cell obtained；When the first system judges have new service request to access described operational cell, the first system can select corresponding Target cell to respond the access request of described business according to described Target cell load list, therefore when the first system in the present invention can transship in its operational cell, by newly requested traffic balancing to second system, avoid but causing this service request failure when having enough abilities and resource to process this new business, it is more conducive to effectively integrating of system resource, improve resource utilization and the success rate of service request, improve the satisfaction of Consumer's Experience.
Description
Technical field
The present invention relates to the communications field, be specifically related to a kind of load equalization method and system.
Background technology
Current communication system is by global system for mobile communications GSM (Global System of Mobile
Communication) progressively to more advanced UMTS UMTS (Universal Mobile
Telecommunications System) and long evolving system LTE (Long Term Evolution) development, with satisfied use
The various demands at family, improve the performance of system.Along with the variation of communication system, different users in the different time periods to being
The demand of system resource is the most at any time in change, such as: the business of the little area carrier of current UMTS UMTS may be
Through reaching maximum, it is impossible to receive new service request again, though this new service request be long evolving system LTE or
Global system for mobile communications GSM is manageable；And the now community of long evolving system LTE or global system for mobile communications
The business that the community of GSM is carried is the most less, and idle resource is more, does not but have new service request, causes the business initiated
Having the ability and be rejected in the case of resource, be unfavorable for resource effectively integrates utilization.
Summary of the invention
The main technical problem to be solved in the present invention is to provide a kind of load equalization method and system, more conducively system money
Effectively integrating of source, improves resource utilization.
For solving above-mentioned technical problem, the present invention provides a kind of load equalization method, including:
The first system is that its operational cell obtains the current loads information of each Target cell in second system；
The first system is according to the current loads information updating Target cell load list of each Target cell obtained；
When the first system judges have new service request to access described operational cell, according to described Target cell load list
Corresponding Target cell is selected to respond the access request of described business.
In an embodiment of the present invention, described the first system selects corresponding according to described Target cell load list
Before Target cell responds the access request of described business, also include judging whether described second system can carry described business,
In this way, then corresponding Target cell is selected to respond the access request of described business according to described Target cell load list.
In an embodiment of the present invention, described the first system is that its operational cell obtains Target cell in second system
Current loads information before, also include: judge described operational cell current loads whether reach set load threshold, as
It is that described the first system is that described operational cell obtains the current loads information of Target cell in second system.
In an embodiment of the present invention, described Target cell load list is Target cell non-overloaded list, described
The first system includes according to Target cell non-overloaded list described in the current loads information updating of each Target cell obtained: according to
The each community current loads information obtained judges whether the current loads of each Target cell exceedes the load thresholding that each community is corresponding
Value, is saved in described Target cell non-overloaded list by the Target cell exceeding the load threshold of correspondence by the first preset rules
In；When judging that the current loads of Target cell is not less than corresponding load threshold, it is judged that whether this community is in institute
State in list and existed, as existed, then it is deleted from described Target cell non-overloaded list.
In an embodiment of the present invention, described Target cell load list is that Target cell transships list, described the
One system includes according to Target cell overload list described in the current loads information updating of each Target cell obtained: according to acquisition
Each community current loads information judge whether the current loads of each Target cell exceedes the load threshold that each community is corresponding, will
Current loads is saved in described Target cell not less than the Target cell of corresponding load threshold by the second preset rules
In overload list；When judging that Target cell current loads exceedes corresponding load threshold, it is judged that whether this community
Described list exists, as existed, then it has been deleted from the overload list of described Target cell.
In an embodiment of the present invention, described the first system redirects little from described target by wireless heterogeneous networks
District's non-overloaded list selects corresponding Target cell respond the access request of described business, specifically include: described the first system
In the redirection information that wireless heterogeneous networks redirects, corresponding described first preset rules fills in described Target cell non-overloaded
The frequency point information that in list, each Target cell is corresponding, carries out wireless heterogeneous networks redirection according to this redirection information.
In an embodiment of the present invention, described the first system is redirected by wireless heterogeneous networks and selects not described
Target cell in Target cell overload list responds the access request of described business, specifically wraps when there is not such community
Include: described the first system gets the number of the overloaded cells on each frequency of second system according to the overload list of described Target cell
Amount, is filled up to wireless heterogeneous networks weight by the frequency point information of each frequency by the order that overloaded cells quantity on each frequency is ascending
In the redirection information of orientation, carry out wireless heterogeneous networks redirection according to this redirection information.
In an embodiment of the present invention, described the first system is that described operational cell obtains by the information flow that direct transfers
The current loads information of Target cell in second system.
In an embodiment of the present invention, during described the first system is gsm system, UMTS system, LTE system
Kind, described second system is at least one being different from described the first system in gsm system, UMTS system, LTE system.
Present invention also offers a kind of load balancing system, including:
The first system: for obtaining the current loads information of each Target cell in second system for its operational cell；
Current loads information updating Target cell load list according to each Target cell obtained；It is additionally operable to judging have
When new service request accesses described operational cell, select the response of corresponding Target cell according to described Target cell load list
The access request of described business.Second system: for providing the current loads letter of corresponding Target cell for described the first system
Breath；
In an embodiment of the present invention, described the first system is additionally operable to select according to described Target cell load list
Before corresponding Target cell responds the access request of described business, it is judged that whether described second system can carry described business,
In this way, then corresponding Target cell is selected to respond the access request of described business according to described Target cell load list.
In an embodiment of the present invention, described the first system is additionally operable to obtain mesh in second system into its operational cell
Before the current loads information of mark community, it is judged that whether described operational cell current loads reaches the load threshold set, as
It is that described the first system is that described operational cell obtains the current loads information of Target cell in second system.
In an embodiment of the present invention, during described the first system is gsm system, UMTS system, LTE system
Kind, described second system is at least one being different from described the first system in gsm system, UMTS system, LTE system.
The invention has the beneficial effects as follows: the first system in the present invention can be each in its operational cell acquisition second system
The current loads information of Target cell；And according to the current loads information updating Target cell load row of each Target cell obtained
Table；When the first system judges have new service request to access described operational cell, the first system can be little according to described target
District load list selects corresponding Target cell to respond the access request of described business, and therefore the first system in the present invention can be
During the overload of its operational cell, by newly requested traffic balancing to second system, it is to avoid new having enough abilities and resource to process this
But cause effectively integrating of this service request failure, more conducively system resource during business, improve resource utilization and service request
Success rate, improve the satisfaction of Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the load equalization method schematic flow sheet of the embodiment of the present invention one；
Fig. 2 is the information flow schematic diagram that direct transfers of the embodiment of the present invention two；
Fig. 3 is the information flow schematic diagram that direct transfers of the embodiment of the present invention three.
Detailed description of the invention
Combine accompanying drawing below by detailed description of the invention the present invention is described in further detail.
Embodiment one:
Load balancing system in this example includes the first system and second system, refer to the load disclosed in Fig. 1, this example
Equalization methods comprises the following steps:
The first system is that its operational cell obtains the current loads information of each Target cell in second system；Concrete, the
One system is that operational cell obtains the current loads information of Target cell in second system by the information flow that direct transfers；
The first system, according to the current loads information updating Target cell load list of each Target cell obtained, is worth note
Meaning, in this example, the first system can be that a Target cell load list can be safeguarded in each of which community, specifically can be according to reality
Situation selects；
When the first system judges have new service request to access described operational cell, according to described Target cell load list
Select corresponding Target cell in second system to respond the access request of described business, i.e. the first system in this example can be by new
Requested service is balanced in second system, it is to avoid the cell-overload in the first system, and the Target cell resource in second system
In the case of available free, the failed situation of request of the new business initiated to the operational cell of the first system, more conducively resource
Effectively integrate.
In this example, in order to prevent second system from can not carry user in the case of the new business that the first system is asked,
One system will cause this service request failure scenarios, at the first system root by this traffic balancing in the Target cell of second system
Before selecting corresponding Target cell to respond the access request of described business according to Target cell load list, also include judging second
Whether system can carry this new business, if carrying, the first system just selects corresponding target according to Target cell load list
Community responds the access request of described business.
Meanwhile, in order to further improve effectively integrating of efficiency and resource, the first system in this example can only exist
In the case of the overload of its operational cell, just go the current loads information of each Target cell in second system that obtains, therefore in this example
The first system obtaining in second system before the current loads information of Target cell for its operational cell, may also include judgement
Whether described operational cell current loads reaches the step of the load threshold set, and as reached the threshold value set, i.e. should
Operational cell become overloaded, and the first system just obtains the current loads information of Target cell in second system for it.Noticeable
It is that the information on load of this Li Zhongge community can the information on load that used of Shi Ge community, it is also possible to Shi Ge community is worked as
Front residue can use information on load.
Target cell load list in this example can be Target cell non-overloaded list, it is possible to crosses for Target cell and lists
Table, is described in detail respectively with regard to both the above below:
When Target cell load list is Target cell non-overloaded list, the first system is according to each Target cell obtained
Current loads information updating Target cell non-overloaded list includes: each community current loads information according to obtaining judges each target
Whether the current loads of community exceedes the load threshold that each community is corresponding, and current loads exceedes corresponding load thresholding
The Target cell of value is saved in described Target cell non-overloaded list by the first preset rules, by current loads not less than therewith
The Target cell of corresponding load threshold is deleted from described Target cell non-overloaded list.It should be noted that the most each
Community current loads is the available load that each community is current.What the most each community was current uses load, when for negative
During lotus, the above-mentioned mode judging whether to overload each community should do corresponding adjustment.First preset rules is concretely: will not transship
Target cell once arrange by the order that its available load value is descending, or ascending order is arranged in order, also
Can random alignment.When the first system detects new service request, it is judged that whether second system can carry this business, if
It is then to be redirected by wireless heterogeneous networks and select corresponding Target cell to respond described industry from Target cell non-overloaded list
The access request of business, particularly as follows: described the first system correspondence first in the redirection information that wireless heterogeneous networks redirects is pre-
If rule fills in the frequency point information that in described Target cell non-overloaded list, each Target cell is corresponding, it is preferably the mesh that will do not transship
Mark community by the descending frequency point information filling in each community successively that puts in order of its available load value in redirection information
To improve the success rate redirected.The first system is descending by the available load value of each Target cell according to this redirection information
Order redirect trial successively.Meanwhile, if there is extra demand in operator to the frequency of Target cell, the most also need into one
Step is selected the satisfactory Target cell of frequency from above-mentioned each Target cell and is redirected trial, such as: work as operator
When having LTE FDD (FDD) and LTE TDD (time division duplex) frequency, if operator only wants to user from first it is simultaneously
When system is balanced to the community of LTE FDD (or LTE TDD) frequency, only select when selecting frequency the most in lists to meet LTE
The Target cell of FDD (or LTE TDD) frequency.
When Target cell load list is Target cell overload list, the first system working as according to each Target cell obtained
The overload list of preload information updating Target cell includes: each community current loads information according to obtaining judges each Target cell
Current loads whether exceed the load threshold that each community is corresponding, by current loads not less than corresponding load threshold
Target cell by the second preset rules be saved in described Target cell overload list in, current loads is exceeded corresponding
The Target cell of load threshold is deleted from the overload list of described Target cell.It should be noted that the most each community is current
Load is the available load that each community is current.What the most each community was current uses load, when for using load, above-mentioned
Judge that the mode whether overloaded each community should do corresponding adjustment.Second preset rules is concretely: will the Target cell of overload
The order descending by its load value used once arranges, or ascending order is arranged in order, also
Can random alignment.When the first system detects new service request, it is judged that whether second system can carry this business, if
It is then to be redirected the community selected not in the overload list of this Target cell by wireless heterogeneous networks and respond connecing of described business
Enter request, when there is not such community particularly as follows: the first system can get second according to Target cell overload list is
The quantity of the overloaded cells united on each frequency, i.e. would know that on which frequency, overloaded cells quantity is most, and which frequency transships
Number of cells is minimum, then the frequency point information of each frequency is filled up to by the order that overloaded cells quantity on each frequency is ascending
In the redirection information that wireless heterogeneous networks redirects, the first system redirects trial successively according to this redirection information.
The first system in this example can be gsm system (in this example referred to as 2G system), UMTS system (in this example referred to as
3G system), one in LTE system (in this example referred to as 4G system), second system can be gsm system, UMTS system, LTE
System is different from least one of described the first system.Load balancing in 2G system can be arrived by i.e. scheme disclosed in this example
In 3G system and/or 4G system, it is possible to by the load balancing in 3G system to 2G system and/or 4G system, and by 4G system
Load balancing in system is in 2G system and/or 3G system.In order to be better understood from the present invention, in detail below for various situations
Illustrate.
Embodiment two:
By in the load balancing in UMTS system to LTE system, specific as follows:
One, UMTS system judges whether its operational cell transships:
User initiates data service in the operational cell of UMTS system (i.e. the first system), if UMTS system judges its work
The load of community has reached the threshold value arranged, then it is assumed that the operational cell current loads of this UMTS system is too high, this work
Community has been transshipped, and the data service of follow-up new access needs to be balanced to LTE system (i.e. second system)；
Further, in this example, the load of the UMTS system operational cell of assessment, can be that community has used
Load value, it is also possible to be the current available load value in community.
Further, for the operational cell of UMTS system, the load of this community can be power, code resource, HSDPA
Handling capacity, HSUPA handling capacity, number of users, in CE (channel element, channel element) resource and transfer resource
Or several.
Two, the current loads information of each Target cell during UMTS system obtains LTE system, according to the current loads letter obtained
Cease more new target cell load list:
1, UMTS system obtains the current loads information of each Target cell in LTE system by the information flow that direct transfers, and please join
See Fig. 2, specific as follows:
(Source Radio Network Controller/Evolved Node B, source takes SRNC in UMTS system
Business radio network controller) send DIRECT to SGSN (Serving GPRS Support Node, Serving GPRS Support Node)
INFORMATION TRANSFER (direct transfer information).The RIM Transfer that DIRECT INFORMATION TRANSFER carries
(RIM Transfer, RIM:RAN Information Management, wherein RAN refers to: Radio Access
Network, wireless access network) comprise RIMInformation and RIM Routing Address.Wherein, RIM (RAN
Information Management) the RIM Request PDU of Information (wireless access network information management information)
(Protocol Data Unit) (wireless access network information management request protocol data cell) indicates which LTE adjacent area of needs
The current loads information of (i.e. Target cell in LTE system)；RIM Routing Address (wireless access network information management road
By address) indicate the eNB at these places, community.LTE system inserts RIM the cell load information required for UMTS system
Response PDU (wireless access network information management response protocol data cell), by DIRECT INFORMATION
TRANSFER message feedback is to UMTS system.By this information flow that direct transfers, it is little that UMTS system can obtain each target in LTE system
The uplink and downlink information on load that district is current.
The attention of value is, in this example, UMTS system is little also by target in core net relocation information acquisition LTE system
The current loads information in district.
2, UMTS system is according to the current loads information updating Target cell load list obtained:
The load evaluation of each Target cell in LTE system: what LTE system returned to UMTS system is each Target cell
Cell Capacity Class value (cell capacity grade) and Capacity value (community active volume).Target is little
The absolute active volume in district is availableload=Cell Capacity Class value × Capacity value,
(uplink and downlink computational methods are identical).When LTE system does not has the Cell Capacity Class Value of feedback target community
Time, then availableload=Capacity Value.
The renewal of Target cell load list, including following two mode, optional one during application:
Target cell non-overloaded list update: Target cell non-overloaded row are safeguarded in the operational cell of each UMTS system
Table.The RNC of UMTS system preserves and more new target cell non-overloaded list in real time, specific as follows: when the Target cell obtained
Descending availableload value is more than the threshold value arranged, and up availableload value is more than the every limit value arranged,
Illustrate this Target cell nonoverload can also access service again, this community is put in Target cell non-overloaded list, in list
Queue up from big to small according to availableload value in all communities.
Target cell overload list update: a Target cell overload list is safeguarded in the operational cell of each UMTS system.
The RNC of UMTS system preserves in real time and list is transshipped in more new target cell, specific as follows: when Target cell descending obtained
Availableload value is less than or equal to the threshold value arranged, or up availableload value is less than or equal to the thresholding arranged
Value, illustrate this Target cell overload cannot access service again, this community is saved in Target cell overload list.Work as target
The up-downgoing availableload load that community reports be all higher than arrange thresholding and this community crossed at Target cell and listed
In table, Ze Jiangci community eliminates this list.
Three, when UMTS system judges have new service request to access described operational cell, according to described Target cell load
The access request of the corresponding Target cell described business of response in list selection LTE system:
The equilibrium of UMTS to LTE redirects real by RRC (Radio Resource Control, wireless heterogeneous networks)
Existing, the LTE system filled in " Inter-RAT info " (Inter-System Information) of Redirection Info (redirection information)
Uniting corresponding frequency point information, then redirect trial according to this redirection information, the mode of redirection specifically has following two
Kind, according to the corresponding mode that redirects of the concrete list used selection:
The implementation of corresponding Target cell non-overloaded list, the redirection that UMTS system redirects at wireless heterogeneous networks
The Target cell not transshipped is filled in the frequency of each community by descending the putting in order of its available load value by information successively
Information in redirection information to improve the success rate redirected.
The implementation of corresponding Target cell overload list, UMTS system can get according to Target cell overload list
The quantity of the overloaded cells on each frequency of LTE system, i.e. would know that on which frequency, overloaded cells quantity is most, on which frequency
Overloaded cells minimum number, is then filled out the frequency point information of each frequency by the order that overloaded cells quantity on each frequency is ascending
Writing in the redirection information that wireless heterogeneous networks redirects, UMTS system redirects successively according to this redirection information tastes
Examination.
Below the citing of both the above implementation is described in further details, in order to understand the present invention:
Safeguard the implementation of Target cell non-overloaded list:
Step 101: (i.e. the minimum ability of terminal must be to support 3G and 4G to the dual-mode terminal of support UMTS and LTE simultaneously
System, can be to touch terminal GSM/UMTS/LTE, UMTS/TD-SCDMA/LTE more) in UMTS community, (i.e. the work of UMTS system is little
District) initiate data service.If now the available load of the HSDPA handling capacity of UMTS community is 30%, and HSDPA handling capacity can be used
Load door is limited to 40%, then explanation this UMTS cell load current is high, it is impossible to access new business again, the data industry of follow-up access
Business needs to be balanced to LTE system.
The SRNC of step 102:UMTS system sends DIRECT INFORMATION TRANSFER request offer to SGSN and works as
The information on load that adjacent LTE adjacent area A, B and C (i.e. Target cell A, B and C) community, front UMTS community is current.Pass through RAN-
Information-Request PDU instruction needs the load of A, B and C community；This is indicated by RIM Routing Address
The eNB at a little places, community.LTE system inserts RAN-INFORMATION PDU the cell load information of A, B and C, passes through
DIRECT INFORMATION TRANSFER message feedback is to UMTS system.Current UMTS is obtained by this flow process UMTS system
The uplink and downlink of LTE adjacent area A, B and the C of community can use load.
Step 103: if LTE system return simultaneously community A, B and C Cell Capacity Class value and
Capacity value, then calculate the absolute active volume availableload=Cell Capacity Class of each community
value×Capacity value
Step 104: safeguard a Target cell non-overloaded list to current UMTS cell.Assume that A cell downlink definitely may be used
Being 40% with capacity availableload, absolute active volume availableload of B cell downlink is 50%, C cell downlink
Definitely active volume availableload is 60%, if the overload threshold value arranged is 45%, then A community is overloaded cells, B
Being non-overloaded community with C community, Ze Ba community community B and C puts into LTE non-overloaded cell list.According to availableload
Zhi Ba queues up community from big to small, i.e. LTE non-overloaded cell list small area order is C, B.RIM flow process eNB is triggered when next time
When returning new A, B and C cell load information, need to update LTE non-overloaded cell list.
Step 105: if C community and B community belong to different frequencies, then at UMTS to LTE redirection information
In " the Inter-RAT info " of Redirection Info, filling in C subdistrict frequency point, and B subdistrict frequency point successively, user enters successively
Row redirects to be attempted.If C community can be accessed, then user accesses at C；If C not can be accessed by, then user attempts accessing at B.If C
Place frequency belongs to LTE TDD, and B place frequency belongs to LTE FDD, and operator specifies user can only be balanced to LTE FDD,
Then user directly attempts accessing at B.If C and B belongs to same frequency, then in " Inter-RAT info ", insert C and B place
Frequency.
Safeguard Target cell overload list implementation:
Step 201: support that the dual-mode terminal of UMTS and LTE initiates data service in UMTS community.If now UMTS community
Power be 60% with load, and power has been limited to 50% with load door, then explanation this UMTS cell load current is high, it is impossible to
Accessing new business again, the data service of follow-up access needs to be balanced to LTE system.
The SRNC of step 202:UMTS system sends DIRECT INFORMATION TRANSFER request offer to SGSN and works as
The information on load of LTE community A, B, C and D that front UMTS community is adjacent.Indicated by RAN-Information-Request PDU
Need the load of A, B, C and D community；The eNB at these places, community is indicated by RIM Routing Address.LTE system handle
A, B, C and D cell load information inserts RAN-INFORMATION PDU, is disappeared by DIRECT INFORMATION TRANSFER
Breath feeds back to UMTS system.Can be used by the uplink and downlink of the LTE adjacent area of this flow process UMTS system acquisition current UMTS cell
Load.
Step 203: if LTE system return simultaneously community A, B, C and D Cell Capacity Class value and
Capacity value, then calculate the absolute active volume availableload=Cell Capacity Class of each community
value×Capacity value
Step 204: safeguard a Target cell overload list to current UMTS cell.Assume that A cell downlink is the most available
Capacity availableload is 30%, and absolute active volume availableload of B cell downlink is 40%, and C cell downlink is exhausted
Being 45% to active volume availableload, absolute active volume availableload of D cell downlink is 60%, if arranging
Overload threshold value be 45%, then A, B and C community is overloaded cells, and D community is non-overloaded community, and Ze Ba community A, B and C are put
Enter in the list of LTE overloaded cells.When next time trigger RIM flow process eNB return new A, B, C and D cell load information time, if A/B/
When the availableload of C community is more than 45%, then updates the list of LTE overloaded cells, delete A, B, C.
Step 205: if A community belongs to LTE frequency point F1, B and C community belongs to another LTE frequency point F2, then at UMTS
In " the Inter-RAT info " of LTE redirection information Redirection Info, filling in place, D community frequency successively, A is little
Place, district frequency, place, B/C community frequency, user redirects trial successively.If D place frequency belongs to LTE TDD, and A/
B/C place frequency belongs to LTE FDD, and operator specifies user can only be balanced to LTE FDD, then user is directly at A place frequency
Point is attempted accessing.
Embodiment three:
By in the load balancing in UMTS system to gsm system, specific as follows:
One, UMTS system judges whether its operational cell transships:
User initiates data service in the operational cell of UMTS system (i.e. the first system), if UMTS system judges its work
The load of community has reached the threshold value arranged, then it is assumed that the operational cell current loads of this UMTS system is too high, this work
Community has been transshipped, and the speech business (business that i.e. gsm system is supported) of follow-up new access needs to be balanced to gsm system (i.e.
Second system)；
Further, in this example, the load of the UMTS system operational cell of assessment, can be that community has used
Load value, it is also possible to be the current available load value in community.
Further, for the operational cell of UMTS system, the load of this community can be power, code resource, HSDPA
Handling capacity, HSUPA handling capacity, number of users, in CE (channel element, channel element) resource and transfer resource
Or several.
Two, the current loads information of each Target cell during UMTS system obtains gsm system, according to the current loads letter obtained
Cease more new target cell load list:
1, UMTS system obtains the current loads information of each Target cell in gsm system by the information flow that direct transfers, and please join
See Fig. 3, specific as follows:
(Source Radio Network Controller/Evolved Node B, source takes SRNC in UMTS system
Business radio network controller) send DIRECT INFORMATION TRANSFER (direct transfer information) to CN.DIRECT
RIM Transfer (RIM Transfer, the RIM:RAN Information that INFORMATION TRANSFER carries
Management, wherein RAN refers to: Radio Access Network, wireless access network) comprise RIM Information and
RIM Routing Address.Wherein, RIM (RAN Information Management) Information (wireless access
Network information management information) RIM Request PDU (Protocol Data Unit) (wireless access network information management request association
View data cell) indicate the current loads information needing which GSM adjacent area (i.e. Target cell in gsm system)；RIM
Routing Address (wireless access network information management routing address) indicates the community ID of these communities.Gsm system handle
Cell load information required for UMTS system inserts RIM Response PDU (wireless access network information management response protocol number
According to unit), by DIRECT INFORMATION TRANSFER message feedback to UMTS system.By this information flow that direct transfers,
UMTS system can obtain the uplink and downlink information on load that each Target cell in gsm system is current.
The attention of value is, in this example, UMTS system is little also by target in core net relocation information acquisition gsm system
The current loads information in district.
2, UMTS system is according to the current loads information updating Target cell load list obtained:
The load evaluation of each Target cell in gsm system: what gsm system returned to UMTS system is each Target cell
Cell Capacity Class value (cell capacity grade), Load value (cell load), RL Load value are (real
Time load), may also include NRL Load Information value (non real-time load information).Definitely can use of Target cell
Capacity is availableload=Cell Capacity Class value × (100%-Load value), (up and under
Row computational methods are identical).Further, the calculation of availableload can also be availableload=Cell
Capacity Class value × (100%-RT Load Value).
The renewal of Target cell load list, including following two mode, optional one during application:
Target cell non-overloaded list update: Target cell non-overloaded row are safeguarded in the operational cell of each UMTS system
Table.The RNC of UMTS system preserves and more new target cell non-overloaded list in real time, specific as follows: when the Target cell obtained
Descending availableload value is more than the threshold value arranged, and up availableload value is more than the every limit value arranged,
Illustrate this Target cell nonoverload can also access service again, this community is put in Target cell non-overloaded list, in list
Queue up from big to small according to availableload value in all communities.
Target cell overload list update: a Target cell overload list is safeguarded in the operational cell of each UMTS system.
The RNC of UMTS system preserves in real time and list is transshipped in more new target cell, specific as follows: when Target cell descending obtained
Availableload value is less than or equal to the threshold value arranged, or up availableload value is less than or equal to the thresholding arranged
Value, illustrate this Target cell overload cannot access service again, this community is saved in Target cell overload list.Work as target
The up-downgoing availableload load that community reports be all higher than arrange thresholding and this community crossed at Target cell and listed
In table, Ze Jiangci community eliminates this list.
Three, when UMTS system judges have new service request to access described operational cell, and judge that gsm system can carry this
During business, corresponding Target cell in gsm system is selected to respond the access of described business according to described Target cell load list
Request:
The equilibrium of UMTS to GSM redirects real by RRC (Radio Resource Control, wireless heterogeneous networks)
Existing, the GSM system filled in " Inter-RAT info " (Inter-System Information) of Redirection Info (redirection information)
Unite corresponding subdistrict frequency point information, then redirect trial according to this redirection information, the mode of redirection specifically have with
Lower two kinds:
The implementation of corresponding Target cell non-overloaded list, the redirection that UMTS system redirects at wireless heterogeneous networks
The Target cell not transshipped is filled in the frequency of each community by descending the putting in order of its available load value by information successively
Information in redirection information to improve the success rate redirected.
The implementation of corresponding Target cell overload list, UMTS system can get according to Target cell overload list
The quantity of the overloaded cells on each frequency of gsm system, i.e. would know that on which frequency, overloaded cells quantity is most, on which frequency
Overloaded cells minimum number, is then filled out the frequency point information of each frequency by the order that overloaded cells quantity on each frequency is ascending
Writing in the redirection information that wireless heterogeneous networks redirects, UMTS system redirects successively according to this redirection information tastes
Examination.
Embodiment four:
By in the load balancing in gsm system to UMTS system, specific as follows:
One, gsm system judges whether its operational cell transships:
User initiates data service in the operational cell of gsm system (i.e. the first system), if gsm system judges that its work is little
The load in district has reached the threshold value arranged, then it is assumed that the operational cell current loads of this gsm system is too high, this operational cell
Having transshipped, the data service of follow-up new access needs to be balanced to UMTS system (i.e. second system)；
Further, in this example, the load of the gsm system operational cell of assessment, can be that community has used
Load value, it is also possible to be the current available load value in community.
Further, for GSM cell, the load of community can be carrier number, in number of users, and transfer resource
One or several.
Two, the current loads information of each Target cell during gsm system obtains UMTS system, according to the current loads letter obtained
Cease more new target cell load list:
1, gsm system obtains the current loads information of each Target cell in UMTS system by the information flow that direct transfers, specifically
As follows:
BSC in gsm system sends DIRECT INFORMATION TRANSFER (direct transfer information) to CN.DIRECT
RIM Transfer (RIM Transfer, the RIM:RAN Information that INFORMATION TRANSFER carries
Management, wherein RAN refers to: Radio Access Network, wireless access network) comprise RIM Information and
RIM RoutingAddress.Wherein, RIM (RAN Information Management) Information (wireless access network
Information management information) RIM Request PDU (Protocol Data Unit) (wireless access network information management request protocol
Data cell) indicate the current loads information needing which UMTS adjacent area (i.e. Target cell in UMTS system)；RIM
Routing Address (wireless access network information management routing address) indicates the RNC ID of these communities.UMTS system handle
Cell load information required for gsm system inserts RIM Response PDU (wireless access network information management response protocol number
According to unit), by DIRECT INFORMATION TRANSFER message feedback to gsm system.By this information flow that direct transfers,
Gsm system can obtain the uplink and downlink information on load that each Target cell in UMTS system is current.
The attention of value is, in this example, gsm system is little also by target in core net relocation information acquisition UMTS system
The current loads information in district.
2, gsm system is according to the current loads information updating Target cell load list obtained:
The load evaluation of each Target cell in UMTS system: what UMTS system returned to gsm system is each Target cell
Cell Capacity Class value (cell capacity grade), Load value (cell load), RL Load value are (real
Time load), may also include NRL Load Information value (non real-time load information).Definitely can use of Target cell
Capacity is availableload=Cell Capacity Class value × (100%-Load value), (up and under
Row computational methods are identical).Further, the calculation of availableload can also be availableload=Cell
Capacity Class value × (100%-RT Load Value).
The renewal of Target cell load list, including following two mode:
Target cell non-overloaded list update: Target cell non-overloaded row are safeguarded in the operational cell of each gsm system
Table.The RNC of gsm system preserves and more new target cell non-overloaded list in real time, specific as follows: when under the Target cell obtained
Row availableload value is more than the threshold value arranged, and up availableload value is more than the every limit value arranged, and says
This Target cell nonoverload bright can access service again, this community is put in non-overloaded list, by Target cell according to
Availableload value is queued up from big to small.
Target cell overload list update: a Target cell overload list is safeguarded in the operational cell of each gsm system.
The RNC of gsm system preserves in real time and list is transshipped in more new target cell, specific as follows: when Target cell descending obtained
Availableload value is less than or equal to the threshold value arranged, or up availableload value is less than or equal to the thresholding arranged
Value, illustrate this Target cell overload cannot access service again, this community is saved in Target cell overload list.If mesh
The up-downgoing availableload load that reports of mark community is all higher than the thresholding that arranges and this community is transshipped at Target cell
In list, Ze Jiangci community eliminates this list.
Three, when gsm system judges have new service request to access described operational cell, arrange according to described Target cell load
The access request of the corresponding Target cell described business of response in table selection UMTS system:
The equilibrium of GSM to UMTS is realized by redirection, the UMTS system filled in the Inter-System Information of redirection information
Uniting corresponding frequency point information, then redirect trial according to this redirection information, the mode of redirection specifically has following two
Kind:
The implementation of corresponding Target cell non-overloaded list, the redirection that gsm system redirects at wireless heterogeneous networks
The Target cell not transshipped is filled in the frequency of each community by descending the putting in order of its available load value by information successively
Information in redirection information to improve the success rate redirected.
The implementation of corresponding Target cell overload list, gsm system can get according to Target cell overload list
The quantity of the overloaded cells on each frequency of UMTS system, i.e. would know that on which frequency, overloaded cells quantity is most, which frequency
Upper overloaded cells minimum number, then presses, by the frequency point information of each frequency, the order that on each frequency, overloaded cells quantity is ascending
Being filled up in the redirection information that wireless heterogeneous networks redirects, gsm system redirects successively according to this redirection information
Attempt.
Embodiment five:
By in the load balancing in LTE system to UMTS system, specific as follows:
One, LTE system judges whether its operational cell transships:
User initiates data service in the operational cell of LTE system (i.e. the first system), if LTE system judges that its work is little
The load in district has reached the threshold value arranged, then it is assumed that the operational cell current loads of this LTE system is too high, this operational cell
Having transshipped, the data service of follow-up new access needs to be balanced to UMTS system (i.e. second system)；
Further, in this example, the load of the LTE system operational cell of assessment, can be that community has used
Load value, it is also possible to be the current available load value in community.
Further, for LTE community, the load of community may is that PRB (physical radio bear, material resources
Resource bearing) number, or several in number of users, and transfer resource.
Two, the current loads information of each Target cell during LTE system obtains UMTS system, according to working as of obtaining
Preload information updating Target cell load list:
1, LTE system obtains the current loads information of each Target cell in UMTS system by the information flow that direct transfers, specifically
As follows:
ENB in LTE system sends DIRECT INFORMATION TRANSFER (direct transfer information) to MME.DIRECT
RIM Transfer (RIM Transfer, the RIM:RAN Information that INFORMATION TRANSFER carries
Management, wherein RAN refers to: Radio Access Network, wireless access network) comprise RIM Information and
RIM Routing Address.Wherein, RIM (RAN Information Management) Information (wireless access
Network information management information) RIM Request PDU (Protocol Data Unit) (wireless access network information management request association
View data cell) indicate the current loads information needing which UMTS adjacent area (i.e. Target cell in UMTS system)；RIM
Routing Address (wireless access network information management routing address) indicates the RNC ID of these communities.UMTS system handle
Cell load information required for LTE system inserts RIM Response PDU (wireless access network information management response protocol number
According to unit), by DIRECT INFORMATION TRANSFER message feedback to LTE system.By this information flow that direct transfers,
LTE system can obtain the uplink and downlink information on load that each Target cell in UMTS system is current.
The attention of value is, in this example, LTE system is little also by target in core net relocation information acquisition UMTS system
The current loads information in district.
2, LTE system is according to the current loads information updating Target cell load list obtained:
The load evaluation of each Target cell in UMTS system: what UMTS system returned to LTE system is each Target cell
Cell Capacity Class value (cell capacity grade), Load value (cell load), RL Load value are (real
Time load), may also include NRL Load Information value (non real-time load information).Definitely can use of Target cell
Capacity is availableload=Cell Capacity Class value × (100%-Load value), (up and under
Row computational methods are identical).Further, the calculation of availableload can also be availableload=Cell
Capacity Class value × (100%-RT Load Value).
The renewal of Target cell load list, including following two mode:
Target cell non-overloaded list update: Target cell non-overloaded row are safeguarded in the operational cell of each LTE system
Table.The eNB of LTE system preserves and more new target cell non-overloaded list in real time, specific as follows: when under the Target cell obtained
Row availableload value is more than the threshold value arranged, and up availableload value is more than the every limit value arranged, and says
This Target cell nonoverload bright can access service again, this community is put in non-overloaded list all Target cells according to
Availableload value is queued up from big to small.
Target cell overload list update: a Target cell overload list is safeguarded in the operational cell of each LTE system.
The eNB of LTE system preserves in real time and list is transshipped in more new target cell, specific as follows: when Target cell descending obtained
Availableload value is less than or equal to the threshold value arranged, or up availableload value is less than or equal to the thresholding arranged
Value, illustrate this Target cell overload cannot access service again, this community is saved in Target cell overload list.If mesh
The up-downgoing availableload load that reports of mark community is all higher than the thresholding that arranges and this community is transshipped at Target cell
In list, Ze Jiangci community eliminates this list.
Three, when LTE system judges have new service request to access described operational cell, and judge that UMTS system can carry this
During business, corresponding Target cell in UMTS system is selected to respond the access of described business according to described Target cell load list
Request:
The equilibrium of LTE to UMTS is realized by redirection, the UMTS system filled in the Inter-System Information of redirection information
Uniting corresponding frequency point information, then redirect trial according to this redirection information, the mode of redirection specifically has following two
Kind:
The implementation of corresponding Target cell non-overloaded list, the redirection that LTE system redirects at wireless heterogeneous networks
The Target cell not transshipped is filled in the frequency of each community by descending the putting in order of its available load value by information successively
Information in redirection information to improve the success rate redirected.
The implementation of corresponding Target cell overload list, LTE system can get according to Target cell overload list
The quantity of the overloaded cells on each frequency of UMTS system, i.e. would know that on which frequency, overloaded cells quantity is most, which frequency
Upper overloaded cells minimum number, then presses, by the frequency point information of each frequency, the order that on each frequency, overloaded cells quantity is ascending
Being filled up in the redirection information that wireless heterogeneous networks redirects, LTE system redirects successively according to this redirection information
Attempt.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this
Bright being embodied as is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of present inventive concept, it is also possible to make some simple deduction or replace, all should be considered as belonging to the protection of the present invention
Scope.
Claims (9)
1. a load equalization method, it is characterised in that including:
The first system is that its operational cell obtains the current loads information of each Target cell in second system；
The first system is according to the current loads information updating Target cell load list of each Target cell obtained；
When the first system judges have new service request to access described operational cell, select according to described Target cell load list
Corresponding Target cell responds the access request of described business；
Described Target cell load list is Target cell non-overloaded list, and described the first system is according to each Target cell obtained
Current loads information updating described in Target cell non-overloaded list include: judge according to each community current loads information obtained
Whether the current loads of each Target cell exceedes the load threshold that each community is corresponding, will exceed the mesh of the load threshold of correspondence
Mark community is saved in described Target cell non-overloaded list by the first preset rules；When the current loads judging Target cell
During not less than corresponding load threshold, it is judged that whether this community has existed in described list, as existed, then by it
Delete from described Target cell non-overloaded list；The current loads of described each Target cell is current can use of each Target cell
Load；
Described the first system is redirected by wireless heterogeneous networks and selects corresponding mesh from described Target cell non-overloaded list
Mark community responds the access request of described business, specifically includes: described the first system is resetting that wireless heterogeneous networks redirects
In information, corresponding described first preset rules fills in the frequency that in described Target cell non-overloaded list, each Target cell is corresponding
Information, carries out wireless heterogeneous networks redirection according to this redirection information.
2. the method for claim 1, it is characterised in that described the first system selects according to described Target cell load list
Before selecting the access request that corresponding Target cell responds described business, also include judging whether described second system can carry institute
Stating business, in this way, then the access selecting corresponding Target cell to respond described business according to described Target cell load list is asked
Ask.
3. the method for claim 1, it is characterised in that described the first system is that its operational cell obtains in second system
Before the current loads information of Target cell, also include: judge whether described operational cell current loads reaches the load set
Threshold value, in this way, described the first system is that described operational cell obtains the current loads information of Target cell in second system.
4. the method as described in any one of claim 1-3, it is characterised in that described the first system by the information flow that direct transfers is
Described operational cell obtains the current loads information of Target cell in second system.
5. the method as described in any one of claim 1-3, it is characterised in that described the first system is gsm system, UMTS system
One in system, LTE system, described second system is to be different from described the first system in gsm system, UMTS system, LTE system
At least one.
6. a load balancing system, it is characterised in that including:
The first system: for obtaining the current loads information of each Target cell in second system for its operational cell；According to acquisition
The current loads information updating Target cell load list of each Target cell；It is additionally operable to judging have new service request to access
During described operational cell, ask according to the access that described Target cell load list selects corresponding Target cell to respond described business
Ask；
Second system: for providing the current loads information of corresponding Target cell for described the first system；
Described Target cell load list is Target cell non-overloaded list, and described the first system is according to each Target cell obtained
Current loads information updating described in Target cell non-overloaded list include: judge according to each community current loads information obtained
Whether the current loads of each Target cell exceedes the load threshold that each community is corresponding, will exceed the mesh of the load threshold of correspondence
Mark community is saved in described Target cell non-overloaded list by the first preset rules；When the current loads judging Target cell
During not less than corresponding load threshold, it is judged that whether this community has existed in described list, as existed, then by it
Delete from described Target cell non-overloaded list；The current loads of described each Target cell is current can use of each Target cell
Load；
Described the first system is redirected by wireless heterogeneous networks and selects corresponding mesh from described Target cell non-overloaded list
Mark community responds the access request of described business, specifically includes: described the first system is resetting that wireless heterogeneous networks redirects
In information, corresponding described first preset rules fills in the frequency that in described Target cell non-overloaded list, each Target cell is corresponding
Information, carries out wireless heterogeneous networks redirection according to this redirection information.
7. system as claimed in claim 6, it is characterised in that described the first system is additionally operable to according to described Target cell load
Before list selects corresponding Target cell to respond the access request of described business, it is judged that whether described second system can carry institute
Stating business, in this way, then the access selecting corresponding Target cell to respond described business according to described Target cell load list is asked
Ask.
8. system as claimed in claim 6, it is characterised in that described the first system is additionally operable to obtain second into its operational cell
In system before the current loads information of Target cell, it is judged that whether described operational cell current loads reaches the load door set
Limit value, in this way, described the first system is that described operational cell obtains the current loads information of Target cell in second system.
9. the system as described in any one of claim 6-8, it is characterised in that described the first system is gsm system, UMTS system
One in system, LTE system, described second system is to be different from described the first system in gsm system, UMTS system, LTE system
At least one.
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| CN104270788B (en) * | 2014-09-28 | 2018-04-17 | 大唐移动通信设备有限公司 | A kind of method and apparatus of different system switching |
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| CN1592165A (en) * | 2003-09-07 | 2005-03-09 | 中兴通讯股份有限公司 | Frequency domain load equalizing controlling method for use while initial access in wide band CDMA system |
| CN101272588A (en) * | 2007-03-19 | 2008-09-24 | 华为技术有限公司 | Alien system switching or re-selection |
| CN101277469A (en) * | 2007-03-29 | 2008-10-01 | 华为技术有限公司 | Method, apparatus and system for implementing packet data retry upstream |
| WO2010105422A1 (en) * | 2009-03-18 | 2010-09-23 | 华为技术有限公司 | Method, device and system for acquiring load information |
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| CN101990262A (en) * | 2009-08-05 | 2011-03-23 | 北京大学 | Access control method, device and cell base station of wireless communication network |
| CN101998514B (en) * | 2009-08-14 | 2013-06-12 | 中兴通讯股份有限公司 | Method and controller for balancing load among cells of multiband time division-synchronous code division multiple access (TD-SCDMA) system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1592165A (en) * | 2003-09-07 | 2005-03-09 | 中兴通讯股份有限公司 | Frequency domain load equalizing controlling method for use while initial access in wide band CDMA system |
| CN101272588A (en) * | 2007-03-19 | 2008-09-24 | 华为技术有限公司 | Alien system switching or re-selection |
| CN101277469A (en) * | 2007-03-29 | 2008-10-01 | 华为技术有限公司 | Method, apparatus and system for implementing packet data retry upstream |
| WO2010105422A1 (en) * | 2009-03-18 | 2010-09-23 | 华为技术有限公司 | Method, device and system for acquiring load information |
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