CN100401836C - Method for accessing special service call to wireless access network - Google Patents
Method for accessing special service call to wireless access network Download PDFInfo
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- CN100401836C CN100401836C CNB2004100426903A CN200410042690A CN100401836C CN 100401836 C CN100401836 C CN 100401836C CN B2004100426903 A CNB2004100426903 A CN B2004100426903A CN 200410042690 A CN200410042690 A CN 200410042690A CN 100401836 C CN100401836 C CN 100401836C
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- interface
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- reserved number
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Abstract
The present invention provides a method for accessing a special service call to a wireless access network. A special service number table, a V5 user information configuring table and a reservation number data table are set in a wireless access network; the method also comprises the steps: A) after the wireless access network receives a mobile terminal MS call, the wireless access network judges whether the call is the special service call according to the special service number table, if true, step B is executed, or else, the process finishes; B) a reservation number having the idle state under a V5 interface is selected in the reservation number data table, and V5 user port information corresponding to the number is obtained in the V5 user information configuring table; besides, the reservation number is set in a busy state; C) a V5 interface loading link between the wireless access network and an exchanger LE is established according to the V5 user port information; D) an air interface service channel between the wireless access network and MS is established, and besides, a connection between MS and LE is established according to the V5 interface loading link established in step C. The present invention can realize the function of special service call not in a preconnecting mode. As a result, the present invention avoids occupying the link resources in advance and ensures reasonable use of the link resources.
Description
Technical field
The present invention relates to the wireless access network technical field, be meant the cut-in method of special service call in a kind of wireless access network especially.
Background technology
Fig. 1 is the Radio Access Network structure chart, and the Radio Access Controller in the Radio Access Network (RAC) links to each other with switch (LE) by the V5 interface; And by base station (BS) access portable terminal (MS), realize MS is inserted PSTN LE, its application comprises Personal Handyphone System(PHS) (PHS) etc.The special service call that picture 110,119 special numbers such as grade are dialed in support is a basic function of all telephone networks.For wireless access network, no matter whether whether this functional requirement calling terminal effective or legal, as long as MS energy access base station all must be realized the special service call business by access switch.For example, a mobile network CDMA user travels in a scenic spot, see a forest fire, if this mobile network does not cover this scenic spot, but the cdma wireless Access Network that a this locality is arranged as the PHS network, has exactly covered this scenic spot, at this moment just require this local CDMA wireless access network also can insert described mobile network user and carry out special service call, otherwise the disaster of bringing is hardly imaginable.That is to say, require wireless access network can support other networks even illegal terminal use's of the same type special service call.
Generally speaking, a Radio Access Network is only supported the special service call of validated user in this Access Network.The Subscriber Number of the online configuration of wireless access is the legal number that switch distributed, therefore these numbers all are validated users at Access Network, and in Access Network, directly set up V5 interface bearing link, with user's access switch according to the V5 user port information of Subscriber Number correspondence.Calling for the disabled user, because illegal terminal does not have the validated user sign in Access Network, also just do not have corresponding V5 port information, causing between Access Network and local switch can't the distribution service link, makes this class user be rejected when dialing special service call in wireless access network.Therefore, illegal terminal is owing to being established to the connection of switch, so can't dial special service call.
At present, realize that the spy of validated user obeys service call in the non-net cut-in method for providing pre-connection at the V5 interface, promptly be to connect based on the exchange of calling out in LE,, realize the spy is obeyed the support of business at V5 interface and the AN path that then connects in advance.Realize pre-connection, except the shortcode code table being set in wireless access network, indicating the V5 user profile allocation list that Subscriber Number and V5 user port information concern, also need to allocate in advance V5 interface and the employed link of LE, promptly be pre-created some connecting paths with Access Network, use for the special service call that can't create connection.When validated user is called out in non-net, Access Network according to shortcode code table and called number analyze be special service call after, use the pre-connection of setting up in advance that this user is inserted LE, realize special service call.The link that pre-connection is distributed can not participate in reallocation, can only be fixed for special service call, and in general the special service call telephone traffic is less, so cause this part link circuit resource utilization rate low.When the E1 fault that the pre-connection bearer channel is provided, can only other the normal E1 in same V5 interface build a path in addition and recover, and can not stride the V5 interface, therefore, the fault self-recovery function of pre-connection mode is also limited.
Summary of the invention
In view of this, main purpose of the present invention is to provide the cut-in method of special service call in a kind of wireless access network, makes can be not realize the special service call function based on the mode of pre-connection, thereby avoids taking in advance of link circuit resource, and it is more reasonable that link circuit resource is used.
Realize the present invention, the shortcode code table need be set in wireless access network, indicate the V5 user profile allocation list that Subscriber Number and V5 user port information concern, also need the reserved number tables of data is set, indicate the corresponding relation of each V5 interface and one and one above reserved number; Reserved number belongs to the Subscriber Number in the V5 user profile allocation list, and mean allocation is on each V5 interface; Further comprising the steps of:
After A, wireless access network receive the calling of mobile terminal MS,, judge whether this calling is special service call according to special service number table analysis called number, if execution in step B then, otherwise withdraw from this flow process;
B, the state under the V5 interface chosen in the reserved number tables of data obtain the V5 user port information corresponding with this reserved number, and this reserved number state are changed to busy attitude by Idle state for idle reserved number in V5 user profile allocation list;
C, wireless access network are according to the V5 user port information foundation of described reserved number correspondence and the V5 interface bearing link between the switch LE;
D, wireless access network set up and MS between the air interface service channel, and according to described foundation and LE between V5 interface bearing link, set up MS to the connection between the LE.
Wherein, further comprise behind the step D: after the MS special service call finishes, V5 interface bearing link between that wireless access network discharges described foundation and the LE, and the reserved number state in the reserved number tables of data that this special clothes business procedure is applied for using is changed to Idle state.
Wherein, in the described reserved number tables of data, described reserved number mean allocation is on each V5 interface.
Wherein, this method further comprises: the telephone number that is configured to reserved number in wireless access network is configured to not charge on LE.
Wherein, after receiving the calling of MS, wireless access network further comprises in the steps A: judge whether this message carries urgent call sign GECI, and whether this GECI value is effective, if, then direct execution in step B; Otherwise, continue to judge according to special service number table analysis called number whether this calling is special service call.
Wherein, step B is described chooses state under the V5 interface and comprises for the step of idle reserved number:
A1, judge whether the V5 Interface status choose is normal, is, execution in step B1 then, otherwise execution in step D1;
B1, in the reserved number of described V5 interface correspondence, search idle reserved number, if find idle reserved number, execution in step C1, otherwise execution in step D1;
C1, choose the idle reserved number that finds, and with the next V5 interface number output of current V5 interface number, the first-selection when choosing the V5 interface next time finishes; Wherein, the V5 interface number in the reserved number table is arranged circlewise;
D1, judge whether all V5 interfaces are inquired about and finish, if then finish, otherwise, get the next V5 interface number of current V5 interface number, and return steps A 1.
By said method as can be seen, provided by the invention in wireless access network the cut-in method of special service call, carry out special service call in the wireless access network even realize that invalid and illegal wireless terminal also can insert; Simultaneously, owing to do not adopt the pre-connection mode, the link that therefore is used for special service call can be distributed to other general callings uses at one's leisure, has improved the bearing link service efficiency between Access Network and the switch, and it is more reasonable that link circuit resource is used.
In each V5 interface mean allocation reserved number, and adopt when selecting V5 interface reserved number and on average choose algorithm, can on average share special service call at each V5 interface, the more important thing is, when one or more V5 interface fault occurring, also can guarantee the special service call business, make the fault-tolerance of special service call stronger.From another angle, connect at Access Network under the situation of a plurality of switches, can between each switch, realize professional load sharing and the protection of special clothes, realize the automatic protection functions of crossover ports, improved the reliability of special service call.
Description of drawings
Fig. 1 is the Radio Access Network structure chart.
Fig. 2 is reserved number data list structure figure.
Fig. 3 is the special service call flow chart.
Fig. 4 chooses flow chart for reserved number.
Embodiment
The invention provides the cut-in method of special service call in a kind of wireless access network, between Access Network and switch, come the bearer channel of dynamic assignment special service call, dial special service call in the wireless access network even the invalid and illegal wireless terminal of realization also can insert by reserved number; And the link that is used for special service call can be distributed to other general callings uses at one's leisure.
The present invention need also need configure reserved number data table outside Access Network side configuration shortcode code table and V5 user profile allocation list.
Wherein, the shortcode code table is preserved special service number, is used for the called number that Access Network dials terminal and analyzes, to determine whether calling is special service call.Judge whether a number is special service number, whether inquiry exists identical number record in the shortcode code table exactly.Wherein, the structure of shortcode code table is as shown in table 1 below: wherein special service number length (Phone Number Length) is used to indicate the number of significant digit of the special service number (Phone Number) of back.
| Information Element (cell) | IE Length (length) | IE Name (name) |
| Phone?Number?Length | ?1?byte | Special service number length |
| Phone?Number | ?32?bytes | Special service number |
Table 1
In Access Network, the V5 interface that all come into force all disposes a collection of telephone number that belongs to this interface in the LE switch, these telephone numbers of all V5 interface ownership of Access Network are called a number resource pond, among the present invention, in this number resource pond, reserve a part of telephone number as reserved number, this part reserved number is not distributed to concrete wireless terminal user and is used in Access Network, being that special service call is professional specially uses.Do not crowd at same V5 interface for guaranteeing all reserved number, these reserved number of mean allocation in all V5 interfaces of Access Network, distribute the reserved number not only can be like this, and mean allocation can make the fault-tolerance of special service call stronger at each LE average load special service call.Specifically what reserved number of distribution give special clothes professional on a RAC, can obey professional telephone traffic according to the spy of this RAC and come the reserved number number of additions and deletions distribution to adjust.
Here, the reserved number tables of data is used for indicating the relation of V5 interface and reserved number, comprise V5 interface table and reserved number table, referring to the graph of a relation shown in Fig. 2: wherein n is subjected to RAC to support the restriction of maximum V5 number of ports, and m is that each V5 interface is supported maximum reserved number number.Dotted arrow shows the corresponding relation between V5 interface table and reserved number table among the figure, and i row reserved number is corresponding to V5 interface i.
Wherein, the structure of V5 interface table is as shown in table 2: Status represents the V5 Interface status, and value 0 and 1,0 represents interface normal here, and 1 represents interface fault.
| Information Element (cell) | IE Length (length) | IE Name (name) |
| V5?ID | ?1?byte | The V5 interface number |
| Status | ?1?byte | The V5 Interface status |
Table 2
The structure of reserved number table is as described in Table 3: busy flag (Used Flag) is represented this reserved number seizure condition, and value 0 and 1,0 expression number are unoccupied, represent Idle state, and 1 expression number is occupied, the busy attitude of representative.
| Information Element (cell) | IE Length (length) | IE Name (name) |
| Phone?Number?Length | ?1?byte | Number length |
| Phone?Number | ?32?bytes | Reserved number |
| Used?Flag | ?1?byte | Busy flag |
Table 3
In addition, according to the special service call principle of not chargeing, the telephone number that also needs to be configured to reserved number in the Access Network is configured to not charge at LE.
After having carried out above-mentioned configuration, being the disabled user, promptly there is not the user of validated user identify label for present networks, just can make the disabled user also can in wireless access network, dial special service call by method provided by the invention.Referring to the flow chart shown in Fig. 3, be example with a terminal call special service number 119, method of the present invention is elaborated:
Step 301: mobile terminal MS is dialed special service number, sends out initial call message (Origination Message) by access channel to BS; This message comprises the IMSI of portable terminal, the called number of being dialled 119, can also comprise urgent call sign (GECI, Global Emergency Call Indication).
After step 302:BS receives Origination Message, give RAC with it transparent transmission.
After step 303:RAC receives Origination Message message,, analyze whether this calling is special service call according to the GECI that carries in this message sign and called number, if execution in step 304 then, otherwise withdraw from this flow process.
In this step, analyze this and call out when whether being special service call, judge at first whether this message carries the GECI sign, and whether the value of this sign be that 1----represents effectively, if then calling is a special service call; Otherwise, judge further whether the called number that this message is carried is special service number, judges promptly whether this called number exists in the shortcode code table, if exist, then calling out is special service call, other situations show that then calling is not a special service call.
Step 304: after being judged as special service call, on average choose algorithm according to reserved number, in the reserved number tables of data, choose reserved number idle under the V5 interface, then, according to obtaining corresponding V5 user port information in the V5 user profile allocation list of this number on Access Network, and this reserved number state is changed to busy attitude by Idle state, promptly put corresponding Used Flag=1.Wherein, reserved number is on average chosen algorithm and is had been described in detail in the back.
According to the corresponding V5 user port information of choosing of reserved number, set up V5 interface bearing link between step 305:RAC and LE.Wherein, the process of setting up V5 interface bearing link under this process and the prior art is identical, is the link establishment process of standard, specifically can be with reference to V5 PSTN agreement.
Step 306: after setting up the success of V5 interface bearing link, RAC issues assignment request message (Assignment Request) to BS, and the air interface service channel between BS and the MS is set up in request.
Step 307: after the air interface service channel was set up successfully between BS and the MS, BS can report assignment to finish message (Assignment Complete) to RAC, and service link is built and finished between this moment MS and the LE, just can make MS insert LE and carry out special service call.
Step 308: then, RAC simulates fixed terminal and sends called number 119 to LE on this link of putting up, simulates fixed terminal specifically and sends dual-tone multifrequency or pulse signal to LE, transmits called number 119.
Step 309:LE is put ring-back tone by the chain road direction MS that has put up after receiving the called number of RAC transmission, behind called party answer, has just realized the special service call of this MS.
After the special service call of this MS finished, RAC discharged the connection link that flow process not only will discharge foundation, this special clothes business procedure will be applied for that also the seizure condition of the reserved number used discharges, and was changed to Idle state, promptly put corresponding Used Flag=0.Like this, the connection link that above special service call uses just can offer general calling and use at one's leisure.
In step 304, adopting reserved number on average to choose algorithm can be with the professional average load of the special service call in the RAC in a plurality of V5 interface of this RAC.Its basic thought is to have chosen a reserved number to be used for special service call in a V5 interface, and special service call will be chosen reserved number from the normal V5 interface of another one next time.In this algorithm, importing parameter into is the V5 interface number, represents the current V5 interface of getting reserved number, exports an idle reserved number and gets the V5 interface of reserved number with next, as the operating result that returns.Referring to the flow chart shown in Fig. 4, this algorithm is elaborated.
Step 401: judge according to the Status field value of the V5 interface number correspondence of choosing in the V5 interface table whether current V5 interface is normal,, then carry out next step if normal, otherwise execution in step 404.Wherein, the Status field that writes down in the V5 interface table is upgraded according to each V5 interface virtual condition in real time by the RAC system and is proofreaied and correct.
Step 402: search idle reserved number at the reserved number table of this V5 interface correspondence, promptly search Used Flag value and be 0 reserved number, find idle reserved number after, execution in step 403, as if not finding in this table, then execution in step 404.
Step 403: the idle reserved number that finds of output, and export next V5 interface number, i.e. the next V5ID of V5 interface table record, the V5 interface of at first choosing when choosing as next time, and finish.Wherein, the end to end annular array of V5 interface number.
Step 404: judge whether the inquiry of V5 interface table finishes, and judges promptly whether the V5 interface number has inquired about a circle, if then finish, otherwise get next V5 interface number, and return step 401.
On average choose algorithm by above V5 interface reserved number, realized special service call on average sharing in all V5 interface load, and can guarantee that one or more V5 interface faults do not influence the special service call business yet, as long as there is a V5 interface normal, special service call still can normally carry out.
The cut-in method of wireless access network special service call described above can be thought to realize based on reserved number, in fact also can think based on V5 user port information, because reserved number and V5 user port information are one to one.Here choosing telephone number and can make configuration more directly perceived, more convenient, be easier to the user and accept, is preferred embodiment.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the cut-in method of special service call in the wireless access network, the shortcode code table is set in wireless access network, indicates the V5 user profile allocation list that Subscriber Number and V5 user port information concern, it is characterized in that, the reserved number tables of data also is set, indicates the corresponding relation of each V5 interface and one and one above reserved number; Reserved number belongs to the Subscriber Number in the V5 user profile allocation list, and mean allocation is on each V5 interface; Further comprising the steps of:
After A, wireless access network receive the calling of mobile terminal MS,, judge whether this calling is special service call according to special service number table analysis called number, if execution in step B then, otherwise withdraw from this flow process;
B, the state under the V5 interface chosen in the reserved number tables of data obtain the V5 user port information corresponding with this reserved number, and this reserved number state are changed to busy attitude by Idle state for idle reserved number in V5 user profile allocation list;
C, wireless access network are according to the V5 user port information foundation of described reserved number correspondence and the V5 interface bearing link between the switch LE;
D, wireless access network set up and MS between the air interface service channel, and according to described foundation and LE between V5 interface bearing link, set up MS to the connection between the LE.
2. method according to claim 1, it is characterized in that, further comprise behind the step D: after the MS special service call finishes, V5 interface bearing link between that wireless access network discharges described foundation and the LE, and the reserved number state in the reserved number tables of data that this special clothes business procedure is applied for using is changed to Idle state.
3. method according to claim 1 is characterized in that, this method further comprises: the telephone number that is configured to reserved number in wireless access network is configured to not charge on LE.
4. method according to claim 1, it is characterized in that, after wireless access network receives the calling of MS, further comprise in the steps A: judge whether this message carries urgent call sign GECI, and whether this GECI value is effective, if, then direct execution in step B; Otherwise, continue to judge according to special service number table analysis called number whether this calling is special service call.
5. method according to claim 1 is characterized in that, step B is described to be chosen state under the V5 interface and comprise for the step of idle reserved number:
A1, judge whether the V5 Interface status choose is normal, is, execution in step B1 then, otherwise execution in step D1;
B1, in the reserved number of described V5 interface correspondence, search idle reserved number, if find idle reserved number, execution in step C1, otherwise execution in step D1;
C1, choose the idle reserved number that finds, and with the next V5 interface number output of current V5 interface number, the first-selection when choosing the V5 interface next time finishes; Wherein, the V5 interface number in the reserved number table is arranged circlewise;
D1, judge whether all V5 interfaces are inquired about and finish, if then finish, otherwise, get the next V5 interface number of current V5 interface number, and return steps A 1.
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| CNB2004100426903A CN100401836C (en) | 2004-05-31 | 2004-05-31 | Method for accessing special service call to wireless access network |
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| CNB2004100426903A CN100401836C (en) | 2004-05-31 | 2004-05-31 | Method for accessing special service call to wireless access network |
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| CN100401836C true CN100401836C (en) | 2008-07-09 |
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| CN101094146B (en) * | 2007-06-28 | 2011-11-30 | 中兴通讯股份有限公司 | Calling method of user of access network based on V5 interface |
| CN114627600A (en) * | 2022-03-22 | 2022-06-14 | 上海安吉星信息服务有限公司 | Internet of vehicles emergency call system and call control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210410A (en) * | 1997-08-29 | 1999-03-10 | 富士通株式会社 | Access network system |
| CN1220799A (en) * | 1996-06-13 | 1999-06-23 | 诺基亚电信公司 | Procedure and system for ensuring emergency communication |
| CN1246265A (en) * | 1997-01-31 | 2000-03-01 | 诺基亚电信公司 | Procedure for setup of emergency call made by unidentified subscriber in wireless local loop |
| US20020111170A1 (en) * | 1999-08-26 | 2002-08-15 | Reijo Romppanen | Management of an overload situation in a telecommunication system |
| US20020191551A1 (en) * | 1999-10-29 | 2002-12-19 | Vesa Heikkila | Method and system for redefinition of an interface |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220799A (en) * | 1996-06-13 | 1999-06-23 | 诺基亚电信公司 | Procedure and system for ensuring emergency communication |
| CN1246265A (en) * | 1997-01-31 | 2000-03-01 | 诺基亚电信公司 | Procedure for setup of emergency call made by unidentified subscriber in wireless local loop |
| CN1210410A (en) * | 1997-08-29 | 1999-03-10 | 富士通株式会社 | Access network system |
| US20020111170A1 (en) * | 1999-08-26 | 2002-08-15 | Reijo Romppanen | Management of an overload situation in a telecommunication system |
| US20020191551A1 (en) * | 1999-10-29 | 2002-12-19 | Vesa Heikkila | Method and system for redefinition of an interface |
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