CN1878403A - Method for A-Flex circuit domain network realizing switching inside bureau - Google Patents

Abstract

The invention relates to a method for realizing internal switch of A-Flex circuit network, which comprises: a, the source mobile exchange center BSC sends switch request message to the source MSC, and the source MSC judges if said message contains the target mobile exchange center mark MSCID; if there is, entering into step b, or else, the source MSC, based on the target region mark CellID and the base station controller group BSC GROUP of source BSC to find the target BSC to complete switch; b, source MSC judges if the target MSC in local region, if it is, complete the switch based on the internal switch process, or else, complete the switch based on inter-junction switch process. The invention can overcome the defects of present technique that the target BSC can not be found by source MSC caused by the same CELLID of BSC, without changing BSC set, and solve the problem that inter-junction switch caused by switching between different BSC internally, to reduce the number of inter-junction switches, and improve the switch quality and success rate.

Description

A kind of A-Flex circuit-domain network realizes the method that intra-office switches

Technical field

The present invention relates to the A-Flex technical field, specifically, relate to the technology that intra-office switches under the A-Flex framework.

Background technology

In the network of not supporting interface flexibleization between Access Network and the core net, a mobile switching centre (MSC) can connect a plurality of base station controllers (BSC), but a base station controller can only connect a mobile switching centre.The annexation between MSC and the BSC is as shown in Figure 1 in the CDMA2000 circuit-domain network under this framework.

Between this mobile switching centre and the base station controller 1: the relation of N has restricted the flexibility of networking, at first, the user capacity of MSC is increasing, when a MSC is shutting down upgrade maintenance, when serious overload or fault were delayed machine, all BSC of following extension were with ineffective, this MSC the user in the wireless range of all BSC coverings all can't carry out Circuit Service communication, influence to the user is very big, also is that institute of operator is flagrant; Secondly, if because the user capacity dilatation need increase a MSC node in existing network, must increase at least one BSC equipment (even Access Network covering and user's disposal ability are enough) simultaneously, otherwise should can't work by newly-increased MSC.

Under A-Flex (the A interface Flexibility A interface flexibleization) framework, a BSC can connect a plurality of MSC simultaneously, behind MSC device upgrade maintenance, overload or a paralysed machine, allow other available MSC that it connected be the service of the user in this BSC institute coverage.The mechanism of A-Flex itself makes the load between a plurality of MSC nodes redistribute with load balancing becomes possibility, and itself also can effectively avoid the appearance of individual node overload situations.

The A-Flex networking as shown in Figure 2, wherein the scope of pond (pool) is made up of the wireless coverage of at least one (being generally a plurality of) BSC, these a plurality of BSC are by all MSC (at least two) common service in the pond.Can see that each BSC links to each other with all MSC in the pond in the pond, can in the middle of all MSC, select arbitrarily.MSC5 has represented MSC and the BSC node of not supporting the A-Flex characteristic outside the pond with its BSC7 that is connected and BSC8 among the figure.

In the A-Flex network, when certain MS roamed in the pond, all core net processing procedures were carried out on a specific CN (core net) node in the pond, promptly for single MS, it has only one in the pond CN processing node of " ownership ", this mode can avoid frequent position to upgrade; And for all MS in the pond, be divided into different " ownership " CN nodes, so be load sharing.

In the WCDMA technical field, Iu-Flex (Iu interface Flexibility Iu interface flexibleization, corresponding to said A-Flex above, all be the flexibility of interface between Access Network and the circuit domain core net) after Release 5, become standardized technology.At the CDMA2000 circuit domain core net, also can use the A-Flex technology.

In a pond of A-Flex network enabled, arbitrary MSC links to each other with all BSC in the pond, so the switching between two BSC has just become the intra-office switching in the pond, and the switching of only striding between two BSC in pond just becomes inter-office switchover.

In not supporting the CDMA2000 circuit-domain network of A-Flex framework, a BSC only connects a MSC, existing changing method is with the illustrated star-like basis that is connected to, can guarantee intra-office, unique intra-office or its BSC of office of navigating to of the target side information that reports according to source BSC during inter-office switchover (the intra-office switching reports cellID or MSCID+cellID, and inter-office switchover reports MSCID+cellID).

But after A-Flex supports, a BSC connects a plurality of MSC, a CELLID (cell ID) is unique under a MSC, in a pond, may not unique just, only report at source BSC under the situation of target CELLID and (only report target CELLID but intra-office switches prior art energy BSC), it is the target BS C of CELLID correspondence that MSC can not judge which BSC that is connected at present; And, MSC reports target side MSCID information and this MSCID not simultaneously at source BSC at present, think inter-office switchover and carry out the inter-office switchover flow process, after A-Flex supports, in fact simultaneously might be as target side MSCID and this MSCID as the intra-office hand-off process yet, MSC lacks this judgement and processing at present.

Therefore, the information that MSC reports according to source BSC after the A-Flex technical support in the prior art can't unique localizing objects side BSC; In addition, when prior art is not supported target side MSC information that MSC reports at source BSC and this MSC information simultaneously but in fact target side MSC and this MSC are not belonged to same A-Flex pond, handle according to the intra-office switching flow.

Summary of the invention

The object of the present invention is to provide a kind of A-Flex circuit-domain network to realize the method that intra-office switches, to solve the problem that source MSC only reports according to BSC under the A-Flex framework in the prior art CELLID can't determine unique target BS C.

For achieving the above object, the present invention adopts following technical scheme: a kind of A-Flex circuit-domain network realizes the method that intra-office switches, and described method comprises the steps:

A, source mobile exchange center BSC send handoff request message to source MSC, source MSC judges whether comprise the sign MSCID of target mobile switching centre in the described handoff request message, if have, change step b, if no, source MSC determines to finish switching behind the target BS C according to the base station controller group BSC GROUP at Target Cell Identifier CELLID and BSC place, source;

B, source MSC judge that target MSC whether in this pond, if in this pond, finishes switching according to the intra-office switching flow, otherwise finish switching according to the inter-office switchover flow process.

Wherein also be included in the corresponding relation that MSC goes up configuration CELLID and BSC GROUP before the step a, wherein CELLID is unique in BSC GROUP.

Wherein said base station controller group id BSC GROUP ID and moving exchanging center MSC ID are the relations of shining upon one by one.

Wherein step b specifically comprises:

Source MSC judges whether to have its pairing BSCGROUP ID according to the target MSC ID that is reported, if have then in BSC GROUP, determine target BS C according to CELL ID, finish switching according to the intra-office switching flow, otherwise switch according to the inter-office switchover flow process.

The present invention overcomes the deficiencies in the prior art, by at the corresponding relation between pre-configured CELLID and the BSCGROUP on the MSC, CELLID is unique in each BSC, after MSC receives the CELLID that source BSC reports just can according between CELLID and the BSC GROUP to judging target MSC with relation.Under the situation that does not change the BSC configuration, solved that BSC has identical CELLID in the pond, cause source MSC can't determine the problem of destination BSC, also solved the inter-office switchover problem that the switching between the different B SC causes in the pond, thereby reduced the quantity of inter-office switchover, improved quality of handoff and success rate.

Description of drawings

Fig. 1 is the annexation figure between CDMA2000 circuit domain MSC and the BSC in the prior art;

Fig. 2 is an A-Flex networking schematic diagram;

Fig. 3 is MSC, BSC and a BSC GROUP graph of a relation under the A-Flex framework of the present invention;

Fig. 4 is the embodiment of the invention one flow chart;

Fig. 5 is the embodiment of the invention two flow charts;

Fig. 6 is the embodiment of the invention three flow charts.

Embodiment

Basic principle of the present invention is to dispose the corresponding relation of CELLID (cell ID) and BSC GROUP (base station controller group) on MSC, CELLID is unique in BSC GROUP, like this, though BSC can connect a plurality of MSC, but logically, BSC with and scope in the sub-district also be subordinated to certain BSC GROUP, when switch taking place, if MSC receives MSCID and cellID that source BSC reports, one navigates to a unique target BS C surely; If but MSC only receives the CELLID (must be that intra-office switches this moment) that source BSC reports, then according to BSC GROUP ID under the BSC of source and the unique target BS C that navigates to of CELLID that reports.

Specifically, a pond is made up of a plurality of MSC and a plurality of BSC, annexation between it is mesh network (promptly full the connection), and star formula annexation under the non-A-FLEX framework has still been kept in the configuration of BSC in the technical solution of the present invention, be that BSC still disposes according to only belonging to a certain MSC, therefore for the BSC of ownership and same MSC, the CELL of its administration has unique CELLID, and being configured to the BSC of different MSC, the CELL of its administration can have identical CELLID.MSC is in order to learn this attaching relation of connected BSC, and the BSC that is configured to belong to same MSC is divided into same BSC Group, and this division is closed and tied up to all is consistent between all MSC in the pond.

Wherein BSC GOUP is made up of several BSC, be similar to the notion of MSC compass of competency, all dispose identical MSCID on the BSC that it comprised, BSC GROUP ID and MSCID shine upon one by one, when therefore switching between the BSC in BSC GROUP, BSC can think that intra-office switches, only report CELLID, source MSC can determine unique target BS C according to the BSC GROUP of CELLID that reports and source BSC ownership, and the BSC between the BSC GOUP is when switching, source BSC can think inter-office switchover, reports MSCID and CELLID, at this moment, MSC according to the configuration determination target MSC whether in this pond, if, then handle according to the intra-office switching flow, otherwise according to the inter-office switchover flow processing.

Further describe below in conjunction with the drawings and specific embodiments.

In the A-Flex network enabled BSC, MSC and BSC GROUP concern that schematic diagram as shown in Figure 3:

Wherein: MSC1 and MSC2 share BSC11, BSC12, BSC13, BSC21 and BSC22, but BSC has still kept original configuration relation, be BSC11, BSC12 and BSC13 still think to be administered by MSC1, and BSC21, BSC22 is administered by MSC2, so BSC11, the CELLID of BSC12 and BSC13 administration CELL is respectively CELL11, CELL12 and CELL21, and the CELLID of BSC21 and BSC22 is respectively CELL21 and CELL22, when the BSC in being configured to identical MSC administration switches, can report CELLID, and be configured to report MSCID to add CELLID when BSC in the different MSC compasss of competency switches.

In order on MSC, to embody this configuration relation, can on two MSC, dispose as follows respectively:

The last switch data configuration of MSC1 is as shown in the table:

Cell ID	BSCID	BSCGROUP ID(＝MSCID)
			CELL11	BSC11	BG 1(MSCID1)
CELL12	BSC12	BG 1(MSCID1)
			CELL21	BSC13	BG 1(MSCID1)
CELL21	BSC21	BG 2(MSCID2)
			CELL12	BSC22	BG 2(MSCID2)

The last switch data configuration of MSC2 is as shown in the table:

Cell ID	BSCID	BSC GROUP ID(＝MSCID)
			CELL11	BSC11	BG 1(MSCID1)
CELL12	BSC12	BG 1(MSCID1)
			CELL21	BSC13	BG 1(MSCID1)
CELL21	BSC21	BG 2(MSCID2)
			CELL12	BSC22	BG 2(MSCID2)

From last table, can see CELL21 is all arranged under BSC13 and the BSC21.

Embodiment one: the flow process of switching between BSC in the same BSC GROUP as shown in Figure 4:

Switching the intra-office that is equivalent to prior art for BSC in the same BSC GROUP between BSC switches.Suppose that the Anchor MSC (grappling mobile switching centre) that switches is MSC2, calling switches to BSC13 from BSC11, if BSC11 only reports Target cell CELL21, explanation is that intra-office switches, then MSC2 is BSC13 according to the target BS C of CELL21 correspondence in BG1 can unique definite BG1 at Target cell CELL21 and source BSC (BSC11) place, switches thereby finish intra-office.If BSC11 reports Target cell CELL21 and MSCID1, then MSC2 can unique definite target be BSC13 according to CELL21 and MSCID undoubtedly, finishes intra-office and switches.

Embodiment two: switching flow is as shown in Figure 5 between BSC GROUP in the pond:

For the switching between switching in the BSC GROUP and BSC GROUP, all be that intra-office switches for MSC, the external message flow process is the same, different is the judgement that is to report for BSC parameter, in the BSC GROUP, only report CELLID, so determine BSC GROUP according to source BSC.For between the GROUP, BSC reports MSCID to add CELLID, and MSC need determine BSC GROUP according to MSCID.

Switch the inter-office switchover that for BSC, is equivalent to prior art between BSC GROUP.Suppose that the Anchor MSC that switches is MSC1, switch to BSC21 from BSC12, the MSCID2 that MSC1 reports according to BSC12, determine that this MSC has been configured its corresponding BG2 data, further in BG2, find its corresponding BSCID again according to Target cell CELL21, illustrate that BSC21 also has annexation with MSC1, therefore can handle according to the intra-office switching flow.

Concrete steps are as follows:

1, the user needs to switch to BSC21 from BSC12, and the last handoff request of sending out of BSC12 is to MSC1, because be inter-office switchover for BSC11, wherein comprises destination CelllID21 and MSCID2;

2, MSC1 determines it corresponding to BSC GROUP2 group according to the MSCID of reporting message, and the BSC according to CellID21 definite destination in BSC GROUP2 group is BSC21 again, issues switch indicating information to BSC21.

Embodiment three: the inter-office switchover flow process as shown in Figure 6:

Suppose that the Anchor MSC that switches is MSC1, switch to BSC31 from BSC12, BSC31 is administered by MSC3, and MSC3 is not in the pond, be that MSC3 does not share BSC with MSC2 and MSC1, then MSC1 does not have corresponding BSC GROUP then to handle according to inter-office switchover according to the Target cell MSCID3 judgement that BSC12 reports, and concrete steps are as follows:

1, the user needs to switch to BSC21 from BSC12, and the last handoff request of sending out of BSC12 is to MSC1, because be inter-office switchover for BSC11, wherein comprises destination CellID31 and MSCID3;

2, MSC1 according to the MSCID of reporting message determine not have corresponding BSC GROUP then according to MSCID to MSC3 transmitting apparatus Indication message, comprise destination CELlID31;

3, after MSC3 receives the equipment Indication message, determine that according to CELLID31 destination BSC is BSC31, send switch indicating information to it.

Claims (4)

1, a kind of A-Flex circuit-domain network realizes the method that intra-office switches, and it is characterized in that described method comprises the steps:

A, source mobile exchange center BSC send handoff request message to source MSC, source MSC judges whether comprise the sign MSCID of target mobile switching centre in the described handoff request message, if have, change step b, if no, source MSC determines to finish switching behind the target BS C according to the base station controller group BSC GROUP at Target Cell Identifier CELLID and BSC place, source;

B, source MSC judge that target MSC whether in this pond, if in this pond, finishes switching according to the intra-office switching flow, otherwise finish switching according to the inter-office switchover flow process.

2, method according to claim 1 is characterized in that, wherein also is included in the corresponding relation that MSC goes up configuration CELLID and BSC GROUP before the step a, and wherein CELLID is unique in BSCGROUP.

3, method according to claim 1 is characterized in that, described base station controller group id BSC GROUP ID and moving exchanging center MSC ID are the relations of shining upon one by one.

4, method according to claim 1 is characterized in that, wherein step b specifically comprises:

Source MSC judges whether to have its pairing BSCGROUP ID according to the target MSC ID that is reported, if have then in BSC GROUP, determine target BS C according to CELL ID, finish switching according to the intra-office switching flow, otherwise switch according to the inter-office switchover flow process.

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