CN103702368A - Method and equipment for selecting SGSN (serving GPRS (general packet radio service) supporting node) - Google Patents
Method and equipment for selecting SGSN (serving GPRS (general packet radio service) supporting node) Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and equipment for selecting an SGSN (serving GPRS (general packet radio service) supporting node), and relates to the field of wireless communication, which aims at solving the problem of the prior art that the expense of interoffice signaling is high in an SGSN-MME (mobile management entity) integrated POOL networking architecture. The method comprises the following steps of when a terminal is accessed, enabling an RNC (radio network controller) to obtain the LTE (long term evolution) support capability of the terminal, and determining the method for selecting the SGSN for the terminal; if the RNC determines to adopt a load balance method to select the SGSN for the terminal, selecting the SGSN for the terminal from a SGSN resource pool according to the LTE support capability of the terminal, wherein the SGSN resource pool comprises the SGSN supporting the SGSN-MME integrating function and the SGSN not supporting the SGSN-MME integrating function. The method solves the problem of the prior art that the expense of interoffice signaling is high in the SGSN-MME integrated POOL networking architecture.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of SGSN system of selection and equipment.
Background technology
From R5 version, 3GPP has introduced Iu-Flex function.Iu-Flex function allows a RNC(Radio Network Controller, radio network controller) a plurality of SGSN(Serving GPRS of physical connection Supporting Node, service universal grouping wireless service technology support node), the region that these SGSN nodes cover belongs to same resource pool POOL region.From RAN(Radio Access Network, wireless access network) angle, POOL region has comprised all RA(Routing Area of the RNC that one group of SGSN node is served, Route Area) region.The operation being walked abreast by a plurality of SGSN in POOL region, they share the business in POOL region jointly.POOL region has strengthened the adaptability of Iu Interface interface (interface between CN and RNC), and typical group-network construction as shown in Figure 1.
NRI(Network Resource Identify, network resource identifier) the SGSN node being used in unique identification POOL region.NRI is included in P-TMSI(Packet Temperate Mobile Subs cription Identity, grouping temporary mobile subscriber identity) among, there is length allocation flexibly, from 0bits to 10bits, not etc., by the network planning, do not determined.
SGSN POOL networking tool has the following advantages:
(1) in POOL region, realize the load sharing between SGSN node, improve network reliability;
(2) by Internet resources, share, improve utilization rate of equipment and installations, reduce investment outlay;
(3) effectively reduce mobile management load, improve network quality.While moving in POOL region due to user, the SGSN node of its service does not change.Therefore, from whole net, adopt after SGSN POOL networking, interoffice (between SGSN) switches and greatly reduces, and signaling traffic load reduces greatly.
UE(User Equipment, terminal), during access 3G packet field network, RNC need to be for UE selects the SGSN that serve from SGSN POOL.Conventionally, RNC applied load balanced way or NRI planning mode are the SGSN that UE selects service.
Under load balancing mode, RNC is according to load balancing algorithm, from select in SGSN POOL the normal and signalling point of a state can and SGSN, as user's service SGSN.The capacity of considering the SGSN that RNC is connected may be different, and RNC can configure a weight for each connected SGSN.When RNC distributes UE, the UE quantity of distributing to each SGSN can be according to weight proportion relation allocation.Particularly, suppose that the number of RNC connection SGSN is N, the weight of each SGSN is M
1: M
2: M
n.Make M=M
1+ M
2+ ... + M
n, so, when the number of users of continuous access reaches M, these users can be assigned to each SGSN, and the number of users that each SGSN distributes meets the proportionate relationship configuring.If existed, certain SGSN signalling point is unreachable or in forbidding state, the number of users distributing for other each normal SGSN, meets this proportionate relationship.
EPC(Evolved Packet Core, evolution block core net) in framework, 3GPP has introduced S1-Flex function.S1-Flex function allows an e-NB(Evolved Node B, evolved Node B, be base station) can a plurality of MME(Mobile Management of physical connection Entity, mobile management entity) region that these MME nodes cover belongs to same POOL region, this region is complete TA(Trace Area, tracking area) set in region.Typical group-network construction as shown in Figure 2.
UE access LTE(Long Term Evolution, Long Term Evolution) during network, e-NB applied load balanced way from MME POOL for UE selects the MME serving.MME POOL networking has the advantage identical with SGSN POOL networking.In addition, while moving in MME POOL due to UE, do not need to change the MME of its service, therefore, from whole net, adopt after MME POOL networking, interoffice (between MME) switches and greatly reduces, and signaling traffic load reduces greatly.
Operator, in the process of construction of LTE network, is generally faced with the fusion problem between existing 3G network and newly-built LTE network.This problem relates to the many aspects such as terminal, Access Network, core net, operation and support system.Wherein, aspect core network, current mainstream solution is to use fusion device networking, comprise SGSN-MME fusion device, SAE GW(System Architecture Evolution GateWay, System Architecture Evolution gateway)-GGSN(Gateway GPRS Support Node, gateway general packet radio service technical support node) fusion device, HLR(Home Location Register, home location register)-HSS(Home Subscriber Server, home subscriber server) fusion device etc.The approach merging can be that newly-built EPC equipment is supported 3G network function simultaneously, can be also to support EPC function to realize by software upgrading existing network 3G equipment.For SGSN-MME fusion device, need to support MME POOL and SGSN POOL function simultaneously.Fig. 3 shows the classical group planar network architecture that SGSN-MME merges POOL.SGSN in Fig. 3 and the quantity of MME-SGSN are not limit.
As shown in Figure 3, SGSN POOL is by SGSN
1, SGSN
2, SGSN
3, SGSN
4, SGSN
5, SGSN
6form, MME POOL is by MME
1, MME
2, MME
3form.MME
1, MME
2, MME
3for fusion device, support SGSN function, namely MME simultaneously
1and SGSN
4, MME
2and SGSN
5, MME
3and SGSN
6same set of equipment physically.Because the LTE networking initial stage generally can not accomplished continuous covering, develop LTE user needs the reasons such as a process simultaneously, and therefore, the covering of LTE network is the part during 3G network covers.In this scene, the terminal of access 3G network can be 3G terminal conventionally, can be also 3G/LTE multimode terminal; The terminal of access LTE network is all 3G/LTE multimode terminal conventionally.
In prior art, if adopt load balancing mode, be that access user is selected SGSN, RNC can be by the user of access according to load balancing algorithm assigns to each SGSN in SGSN POOL.When 3G subscription moves in SGSN POOL region, if there is not 3G network to the gravity treatment of LTE network, the SGSN of its service can not change.If there is 3G network to the gravity treatment between LTE network, e-NB can be for this user selects a MME as the MME of its service from MME POOL, and this situation for the terminal just with LTE network accessibility (3G/LTE multimode terminal).RNC may select a non-fusion device as the SGSN of its service for a 3G/LTE multimode terminal, if follow-up this multimode terminal moves and reselects to LTE network, e-NB can select for this terminal the MME of a service, and between this MME and the SGSN of former service, need to complete reuse adoption process by Signalling exchange, increase thus signaling and processed load.
Summary of the invention
The embodiment of the present invention provides a kind of SGSN system of selection and equipment, merges under POOL group-network construction the problem that interoffice signaling expense is large for solving prior art at SGSN-MME.
A SGSN system of selection, comprising:
During terminal access, radio network controller (RNC) obtains the Long Term Evolution LTE tenability of described terminal, and is defined as the mode that described terminal is selected SGSN; If described RNC determines that adopting load balancing mode is that described terminal is selected SGSN, according to the LTE tenability of described terminal, from SGSN resource pool, be that described terminal is selected SGSN, described SGSN resource pool comprises the SGSN that supports SGSN-mobile management entity MME fusion function and the SGSN that does not support SGSN-MME fusion function.
From such scheme, can find out, RNC can identification terminal LTE tenability, whether can identify SGSN is the SGSN that supports SGSN-MME fusion function, and the SGSN that can select to support the SGSN of SGSN-mobile management entity MME fusion function or not support SGSN-MME fusion function for described terminal from SGSN resource pool, avoided in prior art RNC by the terminal distribution that possesses LTE tenability to the SGSN that does not support SGSN-MME fusion function, when having reduced this terminal and having moved to LTE network's coverage area from 3G network overlay area, the interoffice signaling load of SGSN.
Preferably, if described terminal does not possess LTE tenability, adopt load balancing mode preferentially in described SGSN resource pool, not support in the SGSN of SGSN-MME fusion function as described terminal is selected SGSN; If described terminal possesses LTE tenability, adopt load balancing mode preferentially in SGSN resource pool, to support in the SGSN of SGSN-MME fusion function as described terminal is selected SGSN.
From such scheme, can find out, RNC can preferentially select to support for possessing the terminal of LTE tenability the SGSN of SGSN-MME fusion function, the terminal that possesses LTE tenability to reduce changes the probability of SGSN from 3G network moves to LTE network, RNC can also not support for not possessing the preferential selection of terminal of LTE tenability the SGSN of SGSN-MME fusion function, by the SGSN resource of thinking the more branched SGSN-MME of the holding fusion function of terminal reservation that possesses LTE tenability.
Preferably, if described terminal does not possess LTE tenability, according to the first formula, carry out computing, described the first formula is: N
1=n
1mod (K*L
1+ L
2); If 1≤N
1≤ K*L
1, RNC selects not support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects to support the SGSN of SGSN-MME fusion function in resource pool; Wherein, n
1be the numerical value of the first counter, described the first counter is for counting the LTE tenability terminal that do not possess of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and; Mod represents complementation.
From such scheme, can find out, RNC is preferably the SGSN of the terminal selection support SGSN-MME fusion function that possesses LTE tenability, after the SGSN load balancing of the support SGSN-MME fusion function in SGSN resource pool, RNC can select the SGSN that does not support SGSN-MME fusion function in SGSN resource pool for terminal, thereby has guaranteed the load balancing in SGSN resource pool.
Preferably, if described terminal possesses LTE tenability, according to the second formula, carry out computing, described the second formula is: N
2=n
2mod (K*L
2+ L
1); If 1≤N
2≤ K*L
2, RNC selects to support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects not support the SGSN of SGSN-MME fusion function in resource pool; Wherein, n
2be the numerical value of the second counter, described the second counter is for counting the LTE tenability terminal that possesses of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and; Mod represents complementation.
From such scheme, can find out, RNC is preferably the SGSN that the terminal that does not possess LTE tenability selects not support SGSN-MME fusion function.During the SGSN taking turns at each selects, only have after the SGSN load balancing of not supporting SGSN-MME fusion function in SGSN resource pool, RNC just selects the SGSN of the support SGSN-MME fusion function in SGSN resource pool for terminal, and aspect SGSN resource pool ability, the number of times of selecting not support the SGSN of SGSN-MME fusion function is the integral multiple of number of times of selecting to support the SGSN of SGSN-MME fusion function.
Preferably, if described terminal is usingd the mobile identification IMEI in the world as user ID access network, described RNC determines that adopting load balancing mode is that described terminal is selected SGSN; Or if described terminal is usingd international mobile subscriber identity IMSI as user ID access network, described RNC determines that adopting load balancing mode is that described terminal is selected SGSN.
From such scheme, can find out, as long as it is that terminal selects SGSN just to can be implemented as not possess the preferential selection of terminal of LTE tenability not support the SGSN of SGSN-MME fusion function that RNC determine to adopt the mode of load balancing, and be embodied as the SGSN that the terminal that possesses LTE tenability preferentially selects to support SGSN-MME fusion function.
A RNC, comprising:
Acquiring unit, for when terminal accesses, obtains the Long Term Evolution LTE tenability of described terminal;
Determining unit, for when terminal accesses, is defined as the mode that described terminal is selected service universal grouping wireless service technology support node SGSN;
Selected cell, the in the situation that of adopting load balancing mode to be described terminal selection SGSN for determining in described determining unit, the LTE tenability of the described terminal acquiring according to described acquiring unit, from SGSN resource pool, be that described terminal is selected SGSN, described SGSN resource pool comprises the SGSN that supports SGSN-mobile management entity MME fusion function and the SGSN that does not support SGSN-MME fusion function.
From such scheme, can find out, RNC can identification terminal LTE tenability, whether can identify SGSN is the SGSN that supports SGSN-MME fusion function, and the SGSN that can select to support the SGSN of SGSN-mobile management entity MME fusion function or not support SGSN-MME fusion function for described terminal from SGSN resource pool, avoided in prior art RNC by the terminal distribution that possesses LTE tenability to the SGSN that does not support SGSN-MME fusion function, when having reduced this terminal and having moved to LTE network's coverage area from 3G network overlay area, the interoffice signaling load of SGSN.
Preferably, described selected cell specifically for, if described terminal does not possess LTE tenability, adopt load balancing mode preferentially in described SGSN resource pool, not support in the SGSN of SGSN-MME fusion function to select SGSN for described terminal; If described terminal possesses LTE tenability, adopt load balancing mode preferentially in described SGSN resource pool, to support in the SGSN of SGSN-MME fusion function as described terminal is selected SGSN.
From such scheme, can find out, RNC can preferentially select to support for possessing the terminal of LTE tenability the SGSN of SGSN-MME fusion function, the terminal that possesses LTE tenability to reduce changes the probability of SGSN from 3G network moves to LTE network, RNC can also not support for not possessing the preferential selection of terminal of LTE tenability the SGSN of SGSN-MME fusion function, by the SGSN resource of thinking the more branched SGSN-MME of the holding fusion function of terminal reservation that possesses LTE tenability.
Preferably, described selected cell specifically for, if described terminal does not possess LTE tenability, according to the first formula, carry out computing, described the first formula is: N
1=n
1mod (K*L
1+ L
2); If 1≤N
1≤ K*L
1, RNC selects not support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects to support the SGSN of SGSN-MME fusion function in resource pool; Wherein, n
1be the numerical value of the first counter, described the first counter is for counting the LTE tenability terminal that do not possess of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and, mod represents complementation.
From such scheme, can find out, RNC is preferably the SGSN of the terminal selection support SGSN-MME fusion function that possesses LTE tenability.During the SGSN taking turns at each selects, only have after the SGSN load balancing of the support SGSN-MME fusion function in SGSN resource pool, RNC is just for terminal is selected the SGSN that does not support SGSN-MME fusion function in SGSN resource pool, and aspect SGSN resource pool ability, number of times that select to support the SGSN of SGSN-MME fusion function is the integral multiple of number of times of selecting not support the SGSN of SGSN-MME fusion function.
Preferably, described selected cell specifically for, if described terminal possesses LTE tenability, according to the second formula, carry out computing, described the second formula is: N
2=n
2mod (K*L
2+ L
1); If 1≤N
2≤ K*L
2, RNC selects to support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects not support the SGSN of SGSN-MME fusion function in resource pool; Wherein, n
2be the numerical value of the second counter, described the second counter is for counting the LTE tenability terminal that possesses of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and; Mod represents complementation.
From such scheme, can find out, RNC is preferably the SGSN that the terminal that does not possess LTE tenability selects not support SGSN-MME fusion function, after the SGSN load balancing of not supporting SGSN-MME fusion function in SGSN resource pool, RNC can select for this terminal the SGSN of the support SGSN-MME fusion function in SGSN resource pool, thereby has guaranteed the load balancing in SGSN resource pool.
Preferably, described determining unit specifically for, if described terminal is usingd the mobile identification IMEI in the world as user ID access network, determine adopting load balancing mode is that described terminal is selected SGSN; Or, if described terminal is usingd international mobile subscriber identity IMSI as user ID access network, determine that adopting load balancing mode is that described terminal is selected SGSN.
From such scheme, can find out, as long as it is that terminal selects SGSN just to can be implemented as not possess the preferential selection of terminal of LTE tenability not support the SGSN of SGSN-MME fusion function that RNC determine to adopt the mode of load balancing, and be embodied as the SGSN that the terminal that possesses LTE tenability preferentially selects to support SGSN-MME fusion function.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of SGSN POOL group-network construction in prior art;
Fig. 2 is the schematic diagram of MME POOL group-network construction in prior art;
Fig. 3 is the schematic diagram that in prior art, SGSN-MME merges POOL group-network construction;
The schematic flow sheet that the SGSN that Fig. 4 provides for the embodiment of the present invention selects;
Fig. 5 selects the schematic flow sheet of SGSN for what the embodiment of the present invention provided for not possessing the terminal of LTE tenability;
Fig. 6 selects the schematic flow sheet of SGSN for what the embodiment of the present invention provided for possessing the terminal of LTE tenability;
The structural representation of the RNC that Fig. 7 provides for the embodiment of the present invention.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of SGSN system of selection, is applicable to the networking scene that SGSN-MME merges POOL.The embodiment of the present invention is than prior art, RNC configuration in SGSN information, except comprising the information such as number in abutting connection with SGSN, each office direction sign in abutting connection with SGSN, point coding, NRI planning, weight, also should there is each in abutting connection with SGSN, whether to support the information of SGSN-MME fusion function.
In the embodiment of the present invention, when terminal accesses, RNC obtains the LTE tenability of terminal, and definite terminal is selected the mode of SGSN, if RNC determines that adopting load balancing mode is that terminal is selected SGSN, according to the LTE tenability of terminal, for this terminal is selected the SGSN of the support SGSN-MME fusion function in SGSN resource pool or is not supported the SGSN of SGSN-MME fusion function, RNC can be embodied as the SGSN that terminal is chosen as its service flexibly, thereby reduced terminal owing to moving to the waste of the SGSN interoffice signaling causing after LTE network, reduce the signaling of SGSN and processed load.
Below in conjunction with accompanying drawing, the embodiment of the present invention is specifically described.
Framework based on shown in Fig. 3, Fig. 4 shows the schematic flow sheet of the selection SGSN that the embodiment of the present invention provides.In terminal access procedure, RNC is that terminal selects the process of SGSN to comprise:
Step 41:RNC is defined as the mode that this terminal is selected SGSN.The present embodiment be take RNC, and determine to adopt load balancing mode to select SGSN as terminal be that example is described.
During specific implementation, when terminal accesses, RNC selects the mode of SGSN for this terminal and can comprise: load balancing mode, NRI planning mode etc.Concrete, step 41 can realize in the following manner:
(1) if user with IMEI(International Mobile Equipment Identity, international mobile identification) as user ID access network, determine to adopt load balancing mode be that corresponding terminal is selected SGSN to RNC.
(2) if user with IMSI(International Mobile Subscriber Identity, international mobile subscriber identity) as user ID access network, and this user is caller, RNC determines that employing load balancing mode is that corresponding terminal is selected SGSN.
(3) if user is usingd IMSI as user ID access network, and this user is called, IMSI and the Global CN-ID(Global Core Network Identity of RNC record when RNC determines according to this UE of SGSN paging, whole world core net sign) corresponding relation, is defined as the SGSN of corresponding Terminal Service.
(4), if user is usingd P-TMSI as user ID access network, RNC determines that employing NRI planning mode is that corresponding terminal is selected SGSN.
Step 42: in the situation that RNC determines that employing load balancing mode is terminal selection SGSN, RNC obtains the LTE tenability of this terminal.
During specific implementation, if RNC determines that adopting load balancing mode is that terminal is selected SGSN, RNC obtains the LTE tenability of this terminal.
RNC has set up by the Radio Resource control connection of terminal response the LTE tenability that terminal multimode/many wireless access capabilities message element (UE multi-mode/multi-RAT capability IE) in the terminal wireless access capability (UE radio access capability) in (RRC CONNECTION SETUP COMPLETE) message is obtained this terminal.Concrete, support evolved universal terrestrial wireless access Frequency Division Duplexing (FDD) parameter value (Support of E-UTRA FDD) in this IE represents whether terminal supports FDD LTE ability, supports evolved universal terrestrial wireless access time division duplex parameter value (Support of E-UTRA TDD) to represent whether terminal supports TDD LTE ability.
The terminal that possesses LTE tenability at least can comprise 3G/LTE multimode terminal, and the terminal that does not possess LTE tenability at least can comprise 3G terminal or 2G/3G terminal.
Step 43: if terminal does not possess LTE tenability, RNC does not preferentially support in the SGSN of SGSN-MME fusion function to be that this terminal is selected SGSN in SGSN resource pool.
Step 44: if terminal possesses LTE tenability, RNC preferentially supports in the SGSN of SGSN-MME fusion function to be that this terminal is selected SGSN in SGSN resource pool.
From above-described embodiment, can find out, if RNC determines that adopting load balancing mode is that terminal is selected SGSN, RNC is according to the LTE tenability of the terminal accessing continuously, from SGSN resource pool, for not possessing the preferential selection of terminal of LTE tenability, do not support the SGSN of SGSN-MME fusion function, for possessing the terminal of LTE tenability, retain the SGSN resource of the more branched SGSN-MME of holding fusion function; RNC preferentially selects to support the SGSN of SGSN-MME fusion function from SGSN resource pool for possessing the terminal of LTE tenability, reduce the terminal that possesses LTE tenability and from 3G network moves to LTE network, changed the probability of SGSN, reduced the signaling traffic load of interoffice.
As a kind of preferred embodiment, the implementation procedure of step 43 can specifically comprise:
Flow process based on shown in Fig. 4, Fig. 5 is a kind of schematic flow sheet preferred embodiment of performing step 43.
Upper the first counter and the second counter of arranging of RNC, the first counter is for the LTE tenability terminal that do not possess of continuous access is counted, and the second counter is for counting the LTE tenability terminal that possesses of continuous access.When not possessing the terminal access of LTE tenability, RNC selects the process of SGSN for this terminal can be as shown in Figure 5, and this flow process can comprise:
Step 51:RNC determines that the terminal of current access, for not possessing the terminal of LTE tenability, reads the count value n of the first counter
1;
Step 52:RNC calculates according to following formula:
N
1=n
1mod(K*L
1+L
2)
Wherein, K is the selection percentage factor, and K is more than or equal to 1 integer, by O & M(Operation and Management, operation and maintenance) configuration; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and; Mod represents complementation.
Step 53: if 1≤N
1≤ K*L
1, proceed to step 54, otherwise, proceed to step 55.
Step 54:RNC selects not support the SGSN of SGSN-MME fusion function in resource pool.
Step 55:RNC selects to support the SGSN of SGSN-MME fusion function in resource pool.
Can find out, when K equals 1, the method is equal to prior art, and when K be while being greater than 1 integer, the method can be implemented as the SGSN that does not support the preferential selection of terminal of LTE ability not support SGSN-MME fusion function, thinks that the terminal that possesses LTE tenability retains the SGSN resource of the more branched SGSN-MME of holding fusion function.
As another kind of preferred embodiment, the implementation procedure of step 44 can as shown in Figure 6, can specifically comprise:
Step 61:RNC determines that the terminal of current access is the terminal that possesses LTE tenability, reads the count value n of the second counter
2;
Step 62:RNC calculates according to following formula:
N
2=n
2mod(K*L
2+L
1)；
Wherein, K is the selection percentage factor, and K is more than or equal to 1 integer, by O & M, configures; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and; Mod represents complementation.
Step 63: if 1≤N
2≤ K*L
2, proceed to step 64, otherwise, proceed to step 65.
Step 64:RNC selects to support the SGSN of SGSN-MME fusion function in resource pool.
Step 65:RNC selects not support the SGSN of SGSN-MME fusion function in resource pool.
Can find out, when K equals 1, the method is equal to prior art, and when K be while being greater than 1 integer, the method can be implemented as the SGSN that supports the terminal of LTE ability preferentially to select to support SGSN-MME fusion function, the terminal that possesses LTE tenability to reduce changes the probability of SGSN from 3G network moves to LTE network, reduces the signaling traffic load of interoffice.
If RNC determines that adopting NRI planning mode is that terminal is selected SGSN, RNC can obtain corresponding network by network resource identification code NRI from the P-TMSI of UE, and is the SGSN that UE selects service according to the corresponding relation of the NRI of planning and SGSN.The NRI of planning and the corresponding relation of SGSN configure to RNC by O & M.If the NRI that RNC obtains does not have corresponding with it SGSN, or corresponding SGSN signalling point is unreachable, or corresponding SGSN is in forbidding state, RNC can applied load balanced way, from select in SGSN POOL the normal and signalling point of a state can and SGSN.
The concrete group-network construction of take is below example, the specific implementation process of description of step 42～step 44.
The SGSN POOL of this group-network construction comprises 6 SGSN, is divided into two groups of SGSN POOL part
1with SGSN POOL part
2, SGSN POOL part wherein
1by SGSN
1, SGSN
2, SGSN
3form SGSN
1, SGSN
2, SGSN
3for not supporting the SGSN equipment of SGSN-MME fusion function, SGSN POOL part
2by MME
1/sGSN
4, MME
2/ SGSN
5, MME
3/ SGSN
6form MME
1/sGSN
4, MME
2/ SGSN
5, MME
3/ SGSN
6for supporting the SGSN equipment of SGSN-MME fusion function.The weight of each SGSN is M
1: M
2: ... M
6, L
1=M
1+ M
2+ M
3, L
2=M
4+ M
5+ M
6.O & M is RNC configuration SGSN POOL part
1with SGSN POOL part
2selection percentage factor K (K is more than or equal to 1 integer).
If it is that terminal is selected SGSN that RNC determine to adopt load balancing mode, and this terminal do not possess LTE tenability (as 3G terminal or 2G/3G terminal etc.), and RNC is preferentially at SGSN POOL part
1in be that this terminal selects SGSN, with at SGSN POOL part
2the more resource of middle reservation is given the terminal that possesses LTE tenability.If RNC determines that adopting load balancing mode is that terminal is selected SGSN, RNC determines that terminal possesses LTE tenability (as 3G terminal or 2G/3G terminal etc.), and RNC is preferentially at SGSN POOL part
2in for this terminal, select SGSN, to reduce terminal, from 3G network moves to LTE network, change the probability of SGSN.
Concrete, RNC can be this terminal selection SGSN according to the mode shown in Fig. 4～Fig. 6, and can reach following effect:
While not possessing the terminal access of LTE tenability, RNC can judge the quantity of the terminal that does not possess LTE tenability that connects access, if this quantity is no more than K*L
1, RNC is according to SGSN POOL part
1in the weight of each SGSN, from SGSN POOL part
1middle selection SGSN distributes to this terminal.Like this, the terminal quantity that does not possess LTE tenability when continuous access reaches L
1time, these terminals can be assigned to SGSN POOL part
1in each SGSN upper, wherein, distribute to SGSN
1, SGSN
2, SGSN
3on terminal quantity be respectively M
1, M
2, M
3.
Along with the quantity of terminal of access constantly increases, when the terminal quantity that does not possess LTE tenability of continuous access reaches K*L
1time (K is the selection percentage factor, and K>=1 and K are integer), these terminals can be continued to be assigned to SGSN POOL part
1in each SGSN upper, wherein, distribute to SGSN
1, SGSN
2, SGSN
3on terminal quantity be respectively K*M
1, K*M
2, K*M
3.
When the terminal quantity that does not possess LTE tenability of continuous access surpasses K*L
1time, these terminals can be assigned to SGSN POOL part
2in each SGSN on.
When the terminal quantity that does not possess LTE tenability of continuous access reaches K*L
1+ L
2time, and be now assigned to MME
1/sGSN
4, MME
2/ SGSN
5, MME
3/ SGSN
6terminal quantity reached respectively M
4, M
5, M
6time, RNC can be by these terminal distribution to SGSN POOL part
1in each SGSN on.
When the terminal quantity that does not possess LTE tenability of continuous access surpasses 2*K*L
1+ L
2time, these terminals can be assigned to SGSN POOL part
2in each SGSN on.
Along with the increase of the terminal quantity that does not possess LTE tenability of continuous access, RNC selects SGSN according to take the terminal that upper type one is each access.
While possessing the terminal access of LTE tenability, RNC can judge the quantity of the terminal that possesses LTE tenability that connects access, if this quantity is no more than K*L
2, RNC is according to SGSN POOL part
2in the weight of each SGSN, from SGSN POOL part
2middle selection SGSN distributes to this terminal.Like this, the terminal quantity that possesses LTE tenability when continuous access reaches L
2time, these terminals can be assigned to SGSNPOOL part
2in each SGSN upper, wherein, distribute to MME
1/sGSN
4, MME
2/ SGSN
5, MME
3/ SGSN
6on terminal quantity be respectively M
4, M
5, M
6.
Along with the quantity of terminal of access constantly increases, when the terminal quantity that possesses LTE tenability of continuous access reaches K*L
2time (K is the selection percentage factor, and K>=1 and K are integer), these terminals can be continued to be assigned to SGSN POOL part
2in each SGSN upper, wherein, distribute to MME
1/sGSN
4, MME
2/ SGSN
5, MME
3/ SGSN
6on terminal quantity be respectively K*M
4, K*M
5, K*M
6.
When the terminal quantity that possesses LTE tenability of continuous access surpasses K*L
2time, these terminals can be assigned to SGSN POOL part
1in each SGSN on.
When the terminal quantity that possesses LTE tenability of continuous access reaches K*L
2+ L
1time, and be now assigned to SGSN
1, SGSN
2, SGSN
3terminal quantity reached respectively M
1, M
2, M
3time, RNC can be by these terminal distribution to SGSN POOL part
2in each SGSN on.
When the terminal quantity that possesses LTE tenability of continuous access surpasses 2*K*L
2+ L
1time, these terminals can be assigned to SGSN POOL part
1in each SGSN on.
By above description, can find out, the embodiment of the present invention merges under POOL group-network construction at SGSN-MME, RNC can be preferably and support the terminal of LTE ability to select one to support that the equipment of SGSN-MME fusion function is its service, can greatly reduce the probability that terminal changes service SGSN from 3G network moves to LTE network, thereby reduce the signaling consumption of a large amount of SGSN interoffices.
Technical conceive based on identical, the embodiment of the present invention also provides a kind of RNC.
The structural representation of a kind of RNC that Fig. 7 provides for the embodiment of the present invention.As shown in Figure 7, this RNC can comprise:
Acquiring unit 71, for when terminal accesses, obtains the Long Term Evolution LTE tenability of described terminal;
Determining unit 72, for when terminal accesses, is defined as the mode that described terminal is selected service universal grouping wireless service technology support node SGSN;
Selected cell 73, the in the situation that of adopting load balancing mode to be described terminal selection SGSN for determining in described determining unit, the LTE tenability of the described terminal acquiring according to described acquiring unit, from SGSN resource pool, be that described terminal is selected SGSN, described SGSN resource pool comprises the SGSN that supports SGSN-mobile management entity MME fusion function and the SGSN that does not support SGSN-MME fusion function.
Preferably, selected cell 73 specifically for, if described terminal does not possess LTE tenability, adopt load balancing mode preferentially in described SGSN resource pool, not support in the SGSN of SGSN-MME fusion function to select SGSN for described terminal; If described terminal possesses LTE tenability, adopt load balancing mode preferentially in described SGSN resource pool, to support in the SGSN of SGSN-MME fusion function as described terminal is selected SGSN.
Preferably, selected cell 73 specifically for, if described terminal does not possess LTE tenability, according to the first formula, carry out computing, described the first formula is: N
1=n
1mod (K*L
1+ L
2); If 1≤N
1≤ K*L
1, RNC selects not support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects to support the SGSN of SGSN-MME fusion function in resource pool; Wherein, n
1be the numerical value of the first counter, described the first counter is for counting the LTE tenability terminal that do not possess of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and, mod () represents complementation.
Preferably, selected cell 73 specifically for, if described terminal possesses LTE tenability, according to the second formula, carry out computing, described the second formula is: N
2=n
2mod (K*L
2+ L
1); If 1≤N
2≤ K*L
2, RNC selects to support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects not support the SGSN of SGSN-MME fusion function in resource pool; Wherein, n
2be the numerical value of the second counter, described the second counter is for counting the LTE tenability terminal that possesses of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and; Mod represents complementation.
Preferably, determining unit 72 specifically for, if described terminal is usingd the mobile identification IMEI in the world as user ID access network, determine adopting load balancing mode is that described terminal is selected SGSN; Or, if described terminal is usingd international mobile subscriber identity IMSI as user ID access network, determine that adopting load balancing mode is that described terminal is selected SGSN.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.The processor of these computer program instructions to all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device can be provided, make the function of appointment in a flow process in can realization flow figure of instruction that the processor by this computer or other programmable data processing device carries out or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a square frame of a plurality of flow process and/or block diagram or a plurality of square frame on computer or other programmable devices.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (10)
1. a service universal grouping wireless service technology support node SGSN system of selection, is characterized in that, comprising:
During terminal access, radio network controller (RNC) obtains the Long Term Evolution LTE tenability of described terminal, and is defined as the mode that described terminal is selected SGSN;
If described RNC determines that adopting load balancing mode is that described terminal is selected SGSN, according to the LTE tenability of described terminal, from SGSN resource pool, be that described terminal is selected SGSN, described SGSN resource pool comprises the SGSN that supports SGSN-mobile management entity MME fusion function and the SGSN that does not support SGSN-MME fusion function.
2. the method for claim 1, is characterized in that, described according to the LTE tenability of described terminal, is that described terminal is selected SGSN from SGSN resource pool, specifically comprises:
If described terminal does not possess LTE tenability, adopt load balancing mode preferentially in described SGSN resource pool, not support in the SGSN of SGSN-MME fusion function as described terminal is selected SGSN;
If described terminal possesses LTE tenability, adopt load balancing mode preferentially in SGSN resource pool, to support in the SGSN of SGSN-MME fusion function as described terminal is selected SGSN.
3. method as claimed in claim 2, it is characterized in that, if described terminal does not possess LTE tenability, adopt load balancing mode preferentially in SGSN resource pool, not support for described terminal, to select SGSN in the SGSN of SGSN-MME fusion function, specifically comprise:
If described terminal does not possess LTE tenability, according to the first formula, carry out computing, described the first formula is: N
1=n
1mod (K*L
1+ L
2);
If 1≤N
1≤ K*L
1, RNC selects not support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects to support the SGSN of SGSN-MME fusion function in resource pool;
Wherein, n
1be the numerical value of the first counter, described the first counter is for counting the LTE tenability terminal that do not possess of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and; Mod represents complementation.
4. method as claimed in claim 2, is characterized in that, if described terminal possesses LTE tenability, adopts load balancing mode preferentially in SGSN resource pool, to support for described terminal, to select SGSN in the SGSN of SGSN-MME fusion function, specifically comprises:
If described terminal possesses LTE tenability, according to the second formula, carry out computing, described the second formula is: N
2=n
2mod (K*L
2+ L
1);
If 1≤N
2≤ K*L
2, RNC selects to support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects not support the SGSN of SGSN-MME fusion function in resource pool;
Wherein, n
2be the numerical value of the second counter, described the second counter is for counting the LTE tenability terminal that possesses of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and; Mod represents complementation.
5. the method for claim 1, is characterized in that, described RNC determines employing load balancing mode, specifically comprises:
If described terminal is usingd the mobile identification IMEI in the world as user ID access network, described RNC determines that adopting load balancing mode is that described terminal is selected SGSN;
Or if described terminal is usingd international mobile subscriber identity IMSI as user ID access network, described RNC determines that adopting load balancing mode is that described terminal is selected SGSN.
6. a radio network controller (RNC), is characterized in that, comprising:
Acquiring unit, for when terminal accesses, obtains the Long Term Evolution LTE tenability of described terminal;
Determining unit, for when terminal accesses, is defined as the mode that described terminal is selected service universal grouping wireless service technology support node SGSN;
Selected cell, the in the situation that of adopting load balancing mode to be described terminal selection SGSN for determining in described determining unit, the LTE tenability of the described terminal acquiring according to described acquiring unit, from SGSN resource pool, be that described terminal is selected SGSN, described SGSN resource pool comprises the SGSN that supports SGSN-mobile management entity MME fusion function and the SGSN that does not support SGSN-MME fusion function.
7. RNC as claimed in claim 6, is characterized in that, described selected cell specifically for,
If described terminal does not possess LTE tenability, adopt load balancing mode preferentially in described SGSN resource pool, not support in the SGSN of SGSN-MME fusion function as described terminal is selected SGSN;
If described terminal possesses LTE tenability, adopt load balancing mode preferentially in described SGSN resource pool, to support in the SGSN of SGSN-MME fusion function as described terminal is selected SGSN.
8. RNC as claimed in claim 7, is characterized in that, described selected cell specifically for,
If described terminal does not possess LTE tenability, according to the first formula, carry out computing, described the first formula is: N
1=n
1mod (K*L
1+ L
2);
If 1≤N
1≤ K*L
1, RNC selects not support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects to support the SGSN of SGSN-MME fusion function in resource pool;
Wherein, n
1be the numerical value of the first counter, described the first counter is for counting the LTE tenability terminal that do not possess of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and, mod represents complementation.
9. RNC as claimed in claim 7, is characterized in that, described selected cell specifically for,
If described terminal possesses LTE tenability, according to the second formula, carry out computing, described the second formula is: N
2=n
2mod (K*L
2+ L
1);
If 1≤N
2≤ K*L
2, RNC selects to support the SGSN of SGSN-MME fusion function in resource pool, otherwise RNC selects not support the SGSN of SGSN-MME fusion function in resource pool;
Wherein, n
2be the numerical value of the second counter, described the second counter is for counting the LTE tenability terminal that possesses of continuous access; K is the selection percentage factor, and K is more than or equal to 1 integer; L
1for the weight of the SGSN that does not support SGSN-MME fusion function all in SGSN resource pool and, L
2for the weight of the SGSN of support SGSN-MME fusion functions all in SGSN resource pool and; Mod represents complementation.
10. RNC as claimed in claim 6, is characterized in that, described determining unit specifically for,
If described terminal is usingd the mobile identification IMEI in the world as user ID access network, determine that adopting load balancing mode is that described terminal is selected SGSN;
Or, if described terminal is usingd international mobile subscriber identity IMSI as user ID access network, determine that adopting load balancing mode is that described terminal is selected SGSN.
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| CN201310741910.0A CN103702368B (en) | 2013-12-27 | 2013-12-27 | A kind of SGSN systems of selection and equipment |
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