CN110839230B

CN110839230B - Converged communication attribution transferring and registering method suitable for narrow-band network

Info

Publication number: CN110839230B
Application number: CN201911080932.0A
Authority: CN
Inventors: 许道峰; 田少鹏; 马义; 柯昌骏
Original assignee: CETC 28 Research Institute
Current assignee: CETC 28 Research Institute
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2022-03-15
Anticipated expiration: 2039-11-07
Also published as: CN110839230A

Abstract

The invention provides a method for transferring and registering converged communication attribution suitable for a narrow-band network, which comprises the following steps: step 1, designing a local registry TR, a local roaming migration table TMI and a local roaming migration table TMO; step 2, establishing an attribution self-adaptive evolution method and carrying out attribution migration; step 3, performing crown word head splitting and merging to realize local registration access; and 4, finishing the registration of the roaming user. According to the invention, a large number of roaming registered users are adjusted to local registered users through attribution dynamic adjustment, so that the bandwidth requirement and link quality requirement on a communication network are greatly reduced, the converged communication system can be rapidly deployed in communication environments with narrowband and weak connection link characteristics, such as an industrial Internet of things, battlefield communication, narrowband ad hoc networks, trunking communication networks and the like, the random access and roaming switching of the terminal are supported, and the robustness of the converged communication system can be improved.

Description

Converged communication attribution transferring and registering method suitable for narrow-band network

Technical Field

The invention belongs to the technical field of communication networks and communication services, and particularly relates to a converged communication affiliation transfer and registration method suitable for a narrow-band network.

Background

The converged communication is a new communication mode integrating computer technology and traditional communication technology, and a computer network and a traditional communication network are converged on one network platform to realize a plurality of application services such as telephone, fax, data transmission, audio and video conference, call center, instant communication and the like. A converged communication system generally consists of an access layer, a control layer, and a service layer. The access layer realizes interconnection of heterogeneous network systems and comprehensive access of various terminals, and shields the difference of communication systems and signaling of various networks and terminals. The control layer realizes the unified exchange and comprehensive tandem of multiple services such as voice, data, video and the like, and realizes the functions of call control, media control, signaling conversion, connection and the like. The service layer provides various communication and customized communication services, including instant messages, communication command scheduling, call centers, audio and video recording and the like, and provides communication service scheduling capability for various industry applications through a Computer Telephony Integration (CTI) scheduling service interface.

Generally, each type of terminal of the converged communication system configures one or two home addresses, where the home addresses are generally addresses of a softswitch, a Session Border controller, sbc, (Session Border controller), or an IP Multimedia Subsystem Call Session Control Function, IMS CSCF (IP Multimedia Subsystem Call Session Control Function), and the terminal uses the addresses to send a registration authentication message to log in the converged communication system and send a Call Control message to obtain a converged communication service. The converged communication system on the battlefield also adopts a similar method, converged communication users plan number segments according to certain rules, and all users of the same number segment belong to the same exchange Service platform MSP (Main Service platform).

Due to the fact that converged communication users on a battlefield have strong mobility, the home subscriber data of the MSP and actual service users are easily inconsistent (for example, the home subscriber of the MSP is 6xxx, but the actual users have a large number of 7xxx due to mobile needs), and most of the users in the network area are roaming users.

Registration and call handling of roaming users requires additional messaging interactions between the visiting MSP and the home MSP. When a large number of roaming users exist in the system, the additional network overhead is greatly increased, and for a battlefield communication environment with limited bandwidth resources, the normal operation of the converged communication system and other service systems is seriously affected. In addition, in a network environment with limited transmission bandwidth and unstable link quality, the smaller the number of message interactions between network elements, the lower the probability of congestion and hair packets, and the higher the efficiency and stability of the system. Therefore, the dynamic adjustment of user attribution during the operation of the converged communication system reduces the number of roaming users of the system to the maximum extent, and becomes a key for solving the problem.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a converged communication attribution self-adaptive evolution technology suitable for a narrow-band network, which adjusts a large number of roaming registered users into local registered users through dynamic adjustment of attribution, thereby greatly reducing the bandwidth requirement and link quality requirement on a communication network, supporting rapid deployment of a converged communication system in communication environments with narrow-band and weak-connection link characteristics, such as an industrial Internet of things, battlefield communication, a narrow-band ad hoc network, a trunking communication network and the like, supporting random access and roaming switching of a terminal, and improving the robustness of the converged communication system.

In order to solve the above technical problem, the present invention provides a method for transferring and registering converged communication affiliation suitable for a narrowband network, which comprises the following steps:

step 1, designing a local registry TR, a local roaming migration table TMI and a local roaming migration table TMO;

step 2, establishing an attribution self-adaptive evolution method and carrying out attribution migration;

step 3, after the affiliation is moved, aiming at the access condition of more than two switching service platforms MSP with the same prefix code segment, the prefix head is split and combined, and the local registration access is realized;

and 4, finishing the registration of the roaming user.

The step 1 comprises the following steps:

step 1-1, a local registry TR, a local roaming immigration table TMI and a local roaming immigration table TMO are created and indexed according to the serial numbers of the crown words, wherein the local registry TR and the local roaming immigration table TMI comprise the number of crown words, the total number of access users, the number of local access users, the number of roaming access users and the number of MSP of a roaming place exchange service platform; the local roaming migration table TMO comprises a prefix, a migration exchange service platform MSP address and the number of local roaming access users;

step 1-2, the local registry TR is a user registration information table, and the prefix header of the local registry TR adopts 1 bit or 2 bits;

the local roaming migration table TMI is used for recording a user number segment which is migrated to the local, and the prefix head of the local roaming migration table TMI adopts more than 3 bits;

the local roaming migration table TMO is used for recording a user number segment which migrates from the local, and the prefix head of the local roaming migration table TMO adopts more than 3 bits;

step 1-3, the local registration table TR, the local roaming immigration table TMI and the local roaming immigration table TMO are inquired by adopting a maximum matching priority rule, the local roaming immigration table TMI is inquired at first, and if a crown word head entry matched with a user is found, the unified communication UC terminal is locally registered; secondly, inquiring a local registry TR, if the prefix entry cannot be found, adopting roaming registration, if the prefix entry is found, continuously inquiring the corresponding prefix entry in a local roaming migration table TMO, if the prefix entry is found, indicating that the whole segment of the user number corresponding to the prefix entry is migrated, adopting roaming registration, and if the prefix entry cannot be found, carrying out local registration.

The step 2 comprises the following steps:

step 2-1, typical deployment in a narrow-band communication environment is carried out: the global subscription system GSS, the exchange service platform MSP and the edge interaction platform EXP realize interconnection and intercommunication through a communication network to form a narrow-band converged communication system, and each exchange service platform MSP is provided with an edge interaction platform EXP for unified communication UC terminal access;

step 2-2, registering and analyzing the domain name: the narrow-band fusion communication system adopts a domain name registration mechanism, a switching service platform MSP provides a registered domain name resolution function, the query conversion from a registered domain name to an IP address is realized, and a registered IP address pool is obtained through the domain name resolution of the switching service platform MSP;

and 2-3, establishing an attribution self-adaptive evolution method and carrying out attribution migration.

The step 2-3 comprises the following steps:

step 2-3-1, the unified communication UC terminal registers to an edge interaction platform EXP nearby, and the registered message comprises a registered domain name and a user name;

step 2-3-2, after the edge interaction platform EXP is subjected to necessary processing (the processing comprises the steps of gathering the registration information, recoding and the like of a plurality of registered users), forwarding the registration message of the unified communication UC terminal to a home switch service platform MSP;

step 2-3-3, the MSP processes the registration message, extracts the registration domain name and the user name information, and searches the corresponding IP address list according to the registration domain name;

step 2-3-4, judging whether the IP address of the MSP is contained in the resolved IP address list, and if so, turning to step 2-3-5; if not, turning to the step 2-3-6; the user registration information is provided with domain name information, and the corresponding IP address (list) can be analyzed through the domain name.

Step 2-3-5, searching a local registry TR and a local roaming migration table TMO, if the user number belongs to the local registry TR but not the local roaming migration table TMO, indicating that the unified communication UC terminal belongs to a local exchange service platform MSP, and directly performing authentication registration; otherwise, turning to the step 2-3-6;

step 2-3-6, roaming registration is adopted for the accessed unified communication UC terminal, and the roaming registration corresponds to two conditions, wherein the first condition is that the access switching service platform MSP is not affiliated, and the second condition is that the access switching service platform MSP is deployed on the line and has no registered user data;

step 2-3-7, judging whether the unified communication UC terminal and the access exchange service platform MSP belong to the same domain name, if not, turning to step 2-3-11; otherwise, turning to the step 2-3-8;

step 2-3-8, updating a local roaming migration table TMI, and adding 1 to the number of the corresponding user number prefix heads;

step 2-3-9, judging whether the attribution migration threshold is reached, and if the attribution migration threshold is reached, turning to step 2-3-10; otherwise, turning to the step 2-3-11,

step 2-3-10, negotiating with an attribution exchange service platform (MSP) to carry out attribution migration;

and 2-3-11, ending the attribution migration.

The steps 2-3-9 comprise:

step 2-3-9-1, setting a migration threshold T of the number of roaming users accessing into the narrow-band converged communication system through the ith exchange service platform MSP_miAnd a migration overhead margin T (the home migration also brings overhead, and can be converted into T registered users, generally 15-30);

step 2-3-9-2, calculating the maximum roaming registered user number u_{R_max}And the corresponding access exchange service platform MSP, u_{R_max}＝u_R(j)＝maxu_R(i)，j＝argmaxu_R(i)，u_R(i) In order to access the number of roaming users entering the narrow-band converged communication system through the ith switching service platform MSP,

step 2-3-9-3, comparing the number u of the local registered users_LAnd u_{R_max}If u is a_{R_max}＞max{T_mi,u_LAnd + T, executing the step 2-3-10, and transferring the number segment user attribution corresponding to the prefix head to the jth exchange service platform MSP (the number segment is the whole segment user number corresponding to the prefix head, and each prefix head (number segment) has the local user number u_LAnd u_{R_max}。

The steps 2-3-10 comprise:

step 2-3-10-1, updating a local roaming migration table TMO of the home switch service platform MSP, namely deleting the prefix head related in the step 2-3-9-3 in the TMO table;

step 2-3-10-2, updating a local roaming immigration table TMI of the jth exchange service platform MSP, namely adding a prefix head related in the step 2-3-9-3 in the TMI;

and 2-3-10-3, synchronizing related information to the global subscription system GSS, wherein the related information specifically comprises the crown header which is migrated and the MSP related to the crown header.

The step 3 comprises the following steps:

step 3-1, forming ten primary prefix heads according to the number 0-9 by using the prefix heads matched with one bit, and calculating the number of MSP (mixed-service platform) and the number of access users of the exchange service platform corresponding to each primary prefix head, wherein j is 0,1, 2.

The number of the MSP of the switching service platform corresponding to the jth first-level prefix is shown,

representing the number of access users corresponding to the jth first-level prefix head;

step 3-2, merging the prefix heads: for any switching service platform MSP number greater than 1, i.e. k-level prefix

Wherein p is k-grade crown head composed of k numbers, if the number of the access users is larger than the splitting threshold value T_s(may be set to coincide with the migration overhead margin T), i.e.

Then the crown word head is split to form the k +1 level crown word head, and the relationship before and after the split is

Number of MSP equal to 1 for any exchange service platform, i.e. k-level prefix

Wherein p is k-grade crown head composed of k numbers, if the number of access users is larger than the migration threshold value T_miI.e. by

Then the attribution migration is carried out on the k-level prefix;

and 3-3, merging the prefix heads when detecting that the number of the access users of the prefix heads is lower than a set merging threshold (generally consistent with the migration overhead margin T).

In step 3-3, the merging of the prefix includes merging the prefixes of the same exchange service platform MSP and merging prefixes of two or more different exchange service platforms MSP, and merging the prefixes of the same exchange service platform MSP includes:

if the number of the access users of all k + 1-level prefix heads belonging to the same k-level prefix head of one switching service platform MSP is smaller than a merging threshold value T_me(which may be generally equal to the migration overhead margin T)So that) that

The method includes the steps that the number of registered users corresponding to a k + 1-level prefix header (p, i) is represented, the k + 1-level prefix header (p, i) is composed of k +1 numbers, the first k numbers are p, the last number is i, and the value of i is 0 to 9, all k + 1-level prefix headers belonging to the same k-level prefix header are combined, and the method specifically comprises the following steps:

step a1, deleting all k + 1-level crown word head leaf nodes headed by the crown word head p;

step a2, taking the crown head p as a k-level crown head leaf node;

step a3, updating MSP number and access user number of the exchange service platform with k-level prefix p, namely

The merging of the prefix heads of the more than two different exchange service platforms MSP comprises:

step b1, the global subscription system GSS makes crown merging judgment, that is, selects k +1 level crown which needs merging, they belong to the same k level crown, and the number of access users is less than merging threshold T_meI.e. by

Step b2, the global subscription system GSS notifies the relevant exchange service platform MSP to merge the k + 1-level prefix (TMO, TMI table contains the MSP of the prefix to be merged), and the notified parameters include the k-level prefix p and the merging instruction;

step b3, each related exchange service platform MSP carries out prefix merging according to the step a3, and sends a merging success message to the global subscription system GSS;

step b4, the global subscription system GSS sends the MSP serial number of the belonging and migrating destination exchange service platform to each exchange service platform MSP, the exchange service platform MSP with the largest number of the access users is selected as the MSP of the migrating exchange service platform, and the MSPs of other exchange service platforms are the MSP of the migrating exchange service platform;

step b5, the MSP updates the number of access users and sends confirmation information to GSS;

step b6, the migrant exchange service platform MSP deletes the related k-level prefix (i.e. the prefix just merged), and deletes the related k-level prefix entries in the local registration table TR and the local roaming migration table TMI.

Step 4 comprises the following steps: the converged communication terminal adopts domain name registration (the converged communication system comprises a service end such as MSP and a terminal such as a user telephone, a mobile phone and the like), and carries out domain name resolution and authentication through an exchange service platform MSP, and the method specifically comprises the following steps:

step 4-1, a registration request of the converged communication terminal is sent to an edge interaction platform EXP of the terminal subnet;

step 4-2, the edge interaction platform EXP is appropriately processed (including summarizing registration information of a plurality of registered users, recoding (by compressed messages, adaptive channels) and the like), and is forwarded to an exchange service platform MSP of a converged communication terminal roaming place nearby;

step 4-3, the switching service platform MSP of the roaming place carries out registration domain name resolution, and sends domain name query information to the global subscription system GSS (if the local query does not reach the IP address corresponding to the domain name, the domain name query information is queried to the upper GSS) if necessary;

step 4-4, the global subscription system GSS returns the relevant query information (i.e. the table of correspondence between domain name and IP address, see table 2 in the detailed description);

step 4-5, the exchange service platform MSP of the roaming place forwards the terminal registration information to the exchange service platform MSP of the home place;

step 4-6, the home switch service platform MSP returns registration confirmation information;

step 4-7, the MSP returns registration confirmation information;

and 4-8, returning registration confirmation information by the terminal subnet edge interaction platform EXP.

The invention can realize that the home subscriber data of the MSP is dynamically adjusted among all MSPs when the converged communication service system operates, so that the home subscriber data of the MSP is consistent with the actual subscribers in a network area as much as possible, thereby reducing the number of roaming subscribers of the system to the maximum extent and ensuring that the converged communication system stably, reliably and efficiently operates in a narrow-band and weakly-connected communication link environment.

The invention provides a home self-adaptive evolution method for a narrow-band communication deployment network convergence communication system. By splitting and combining the prefix heads and judging the migration threshold, the self-adaptive adjustment of the user affiliation of the converged communication system along with the user access condition is realized, the expenses of roaming registration and call control are reduced to the maximum extent, and the support capability of the narrow-band communication network on converged communication services, the random access capability of the converged communication system and the rapid deployment capability of the converged communication system are improved.

Compared with the prior art, the invention has the following remarkable advantages: through the dynamic adjustment of attribution, the number of roaming users of the whole system is reduced, so that the number of signaling interaction in the calling process is reduced, and the bandwidth requirement and the link quality requirement on a communication network are greatly reduced. Taking the one-time registration process of the roaming user as an example, the visited MSP and the home MSP need to interact with each other for 4 times of SIP messages, each has 500 bytes on average, and the one-time registration of one user after the home intelligent evolution can reduce the bandwidth occupation of 2000 bytes. Therefore, the invention can better support rapid deployment and random access in the narrow-band and weak-connection communication link environment, and improve the robustness of the converged communication system in the narrow-band communication environment.

Drawings

The foregoing and/or other advantages of the invention will become further apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Fig. 1 is a typical deployment.

Fig. 2 is a home adaptive evolution flow.

Fig. 3 is a tree structure diagram of the prefix.

Fig. 4 is a crown map.

FIG. 5 is a partial multi-level tree prefix diagram.

Fig. 6 is a terminal registration procedure.

Detailed Description

Aiming at application scenes of narrow-band and unreliable communication environments such as industrial Internet of things, tactical communication and the like, the invention provides a fusion communication attribution transfer and registration method suitable for a narrow-band network, which realizes quick system deployment and random user access through an attribution self-adaptive migration technology, improves the robustness of the system and the narrow-band link adaptation capacity to the greatest extent, and specifically comprises the following contents:

(1) typical deployment

A typical deployment includes a global subscription system gss (global Subscriber service), an eXchange service platform MSP, and an edge interaction platform exp (edge eXchange platform), which are interconnected and intercommunicated through a narrowband communication network, as shown in fig. 1. Each MSP has an EXP pending for access by end unified communication uc (unified communication) terminals. The UC terminal may need a large range of mobility due to task requirements, which brings problems of foreign roaming and random access.

(2) Registering and resolving domain names

In order to realize remote roaming and random access of the UC terminal, the narrowband converged communication system adopts a domain name registration mechanism and obtains a registered IP address pool through MSP domain name resolution of an exchange service platform. For example, for military combat and joint combat application scenarios, the registered domain names shown in table 1 below can be designed:

TABLE 1

Serial number	Domain name	Means of
			1	Tuc.arm	Army converged communication
2	Tuc.nav	Naval converged communication
			3	Tuc.air	Air force converged communication
4	Tuc.roc	Rocket military converged communication
			5	Tuc.un	Joint combat converged communication

The MSP provides a normalized registered domain Name resolution function similar to a Domain Name System (DNS), and realizes query conversion from a registered domain Name to an IP address. Typical domain name resolution results in a domain name resolution table as shown in table 2 below:

TABLE 2

Wherein the IP address is an MSP address cluster that can provide UC terminal registration. Each IP address shown in the table corresponds to an online MSP of the army convergence communication service system. When a new MSP is put into use and works normally, an IP address corresponding to the MSP is added to the IP address list corresponding to the domain name.

(3) Home evolution procedure

The mechanism for implementing home adaptive evolution is shown in the flowchart shown in fig. 2, and specifically includes:

step a1, registering the unified communication UC terminal nearby to the edge interaction platform EXP. The registration message includes necessary information such as registration domain name, user name, etc., such as tuc.

Step a2, after the edge interaction platform EXP has undergone the necessary processing, it forwards the registration message of the unified communication UC terminal to its home switch service platform MSP.

Step a3, the MSP processes the registration message, extracts the registration domain name and the user name information, and searches the corresponding IP address list according to the registration domain name.

Step a4, judging whether the local IP address is contained in the resolved IP address list, if yes, turning to step a 5; if not, go to step a 6.

Step a5, find the local registration table TR (Table of registration) and the local roaming Migration table TMO (Table of Migration out). If the user number belongs to the local registration table TR but not to the local roaming migration table TMO, indicating that the unified communication UC terminal belongs to the local exchange service platform MSP, and directly performing authentication registration; otherwise, go to step a 6.

Step a6, roaming registration is adopted for the accessed unified communication UC terminal. The two conditions are corresponding, wherein the access switching service platform MSP is not affiliated, and the access switching service platform MSP is deployed on line without registered user data.

Step a7, judging whether the unified communication UC terminal and the access exchange service platform MSP belong to the same domain name. If not, go to step a 11; otherwise go to step a 8.

Step a8, updating local roaming Migration table TMI (Table of Migration in), accessing the corresponding user number prefix number U_prefPlus 1, i.e. U_pref＝U_pref+1。

Step a9, determine whether the home migration threshold is reached. If yes, go to step a 10; otherwise go to step a 11.

Step a10, negotiating with home switch service platform MSP, and performing home migration, specifically including:

step a10-1, updating a local roaming migration table TMO of a home switch service platform MSP;

step a10-2, updating local registry TR;

step a10-3, updating a local roaming migration table TMI;

step a10-4, synchronizing the related information to the global subscription system GSS;

and step a11, ending.

(4) TR table, TMI table, TMO table design

TR table:

the tr (table of registration) table is a basic user registration information table, which typically takes 1 or 2 digits as the prefix, such as

digits

8 or 81, for identifying the user number that is headed by 8XXX XXXX or 81XX XXXX.

TMI Table:

the tmi (table of Migration in) table is used to record the user number segment migrated to the local, and its prefix header generally adopts more than 3 bits, such as the number 8100, and is used to identify the user number headed by 8100 XXXX.

TMO table:

the tmo (table of Migration out) table is used to record the user number segment migrated from the local, and its prefix is usually more than 3 bits, such as numeral 8200, and is used to identify 8200XXXX headed user number.

(5) Designing a table:

the TR table, TMI table, TMO table are created and indexed by the crown word order number.

The TR table and the TMI table mainly comprise a crown head, a total number U of access users and a number U of local access users_LRoaming access user number U_RThe number of MSPs in a roaming place is N.

The TMO table mainly includes a prefix, an immigration MSP address, a local roaming access user number, and the like, as shown in tables 3 and 4:

TABLE 3

Serial number	Chinese character 'guan' head	Total number of users U	Number u of local users_L	Roaming user number U_R	MSP number N
						1	8	500	200	300	5
2	8200	50	30	20	2
						…

TABLE 4

Serial number	Chinese character 'guan' head	Immigrating MSP address	Number of local roaming access users
				1	8100	192.168.18.100	0
2	8320	192.168.3.100	2
				…

(6) Query rules

The query of the TR table, the TMI table and the TMO table adopts a maximum matching priority rule, which is specifically as follows:

firstly, a TMI table is inquired, and if the TMI table is found, local registration is carried out on the UC terminal;

secondly, inquiring a TR table, and if the prefix entry cannot be found, adopting roaming registration;

if finding the crown word head entry, continuously inquiring the corresponding crown word head entry in the TMO table, if finding, showing that the segment number is already emigrated, and adopting roaming registration; if not, local registration is carried out.

And (3) a migration threshold decision algorithm:

with the progress of home adaptive evolution, a plurality of fragmented registration entries (each entry corresponds to one UC terminal group) appear in the converged communication service system, and are distributed on each MSP. For a converged communication service system with multiple MSPs, one possible scenario is: the UC terminal group represented by the prefix 8100 is assigned to MSP a, the UC terminal group represented by the prefix 8101 is assigned to MSP B, and so on. Thus, there is a need for interaction-related registration information between MSP a and MSP B (possibly implemented by GSS) to support call routing between 8100 and 8101 terminals. Therefore, not only the information interaction amount of roaming registration but also the information synchronization overhead after migration need to be considered when attribution evolves, and an optimal compromise needs to be made between the two.

Suppose the number of registered users of the system is U, wherein the number of local registration is U_LThe number of roaming registration is

u_R(i) For the number of roaming users who access the access system through the ith exchange service platform MSP, the number of the exchange service platform MSP of the roaming place is N, then:

further assume that the cost of local registration is c_LBecause the exchange service platforms MSPs are interconnected by the MESH of the wireless MESH network, no matter which exchange service platform MSP has the same roaming registration cost, the cost is set as c_R＝c_L+c_rThen the total cost C of the system registering the user is:

when the ownership is migrated to the jth MSP, the total cost of the system registered users becomes

If it is not

Then the migration is valid, i.e.:

u_L＜u_R(j)，

therefore, when the number of users roaming and accessing a certain exchange service platform MSP in different places is larger than that of users locally accessing the exchange service platform MSP in home, home migration can be implemented. And if the number of the users with the multiple MSP roaming access is larger than that of the local access users of the home switching service platform MSP, migrating to the switching service platform MSP with the maximum roaming access.

The attribution migration application is initiated by a migration exchange service platform MSP (attribution exchange service platform MSP), informs the migration exchange service platform MSP and informs the global subscription system GSS of the migration result. The attribution evolution algorithm is as follows:

step b1, setting the migration threshold T of roaming registered user number_mAnd a migration overhead margin T, e.g. T_mi＝20；

Step b2, calculating the maximum roaming registered user number and the access MSP, u corresponding to the maximum roaming registered user number_{R_max}＝u_R(j)＝maxu_R(i)，j＝argmaxu_R(i)；

Step b3, comparing the number u of local registered users_LAnd u_{R_max}If u is a_{R_max}＞max{T_mi,u_L+ T }, the number segment is usedThe home ownership is migrated to the jth MSP, c_rThe cost of extra information interaction referring to roaming registration.

(7) Crown splitting and merging

Although the home adaptive evolution can reduce the network occupation overhead of roaming registered users, the total number of current registered users of a certain prefix number segment is not changed, namely the total number of access users before and after home migration is not changed. This may be problematic in that multiple MSPs have similar numbers of access subscribers, and thus do not trigger migration or migrate roaming subscribers in large numbers regardless. Aiming at the condition of multi-MSP access of the same prefix code segment, the prefix splitting and merging technology is provided to realize the local registration access nearby.

The first-order crown heads are matched with one another, and 10 second-order crown heads are formed by introducing second-order matching to the first-order crown heads. Similarly, for a two-bit matched secondary prefix, 10 tertiary prefixes are formed by introducing a third bit match. The prefix splitting technology mainly solves the problem of centralized different-place roaming access of a certain multi-stage prefix.

Splitting the crown head:

taking the prefix 8 as an example, a tree structure is used to describe the prefix structure as shown in fig. 3. According to the condition of registered users, the access condition of the second-level prefix users and the number of participating MSPs can be obtained. The two-stage crown MSP number/access user number case headed by the crown 8 can be represented by the crown distribution diagram shown in FIG. 4. If the number of MSPs corresponding to a certain secondary prefix is 1, the number of access users is greater than 10, and the MSP is not local, the secondary prefix can be split. Meanwhile, the affiliation corresponding to the secondary prefix can be migrated to the corresponding different-place MSP.

From the above analysis, the prefix is split into multiple stages, and the prefix can always be split into a certain level, and at this time, the number of MSPs corresponding to a certain multi-stage prefix is only 1. If the number of the access users reaches the threshold value at this time, the multi-level prefix header can be subjected to attribution migration. Therefore, the following prefix splitting algorithm is proposed:

step c1, referencing the crown mapTen first-level prefix heads are formed according to the numbers 0-9, and the MSP number corresponding to each first-level prefix is calculated

And number of access users

Wherein j is 0,1,2, 9, the superscript represents the number of crown heads, and the subscript represents the number of MSPs or the number of access users;

step c2, for any k-level prefix with MSP number greater than 1, i.e.

Wherein p is k-grade crown head composed of k numbers, if the number of the access users is larger than the splitting threshold value T_sI.e. by

Then crown word head splitting is performed to form the (k + 1) th level crown word head. It is apparent that the relationship between before and after the split is

Step c3, for any MSP number equal to 1 k-level prefix, i.e.

Then a home migration is performed for the multi-level prefix header.

The prefix splitting algorithm is operated in an iterative updating mode, and finally an incomplete multi-level tree-shaped prefix graph can be formed, wherein leaf nodes are non-splittable prefix heads, namely the prefix heads with the MSP number of 1 or the number of access users smaller than a splitting threshold value; and the other nodes are splittable crown heads, namely the crown heads with the MSP number larger than 1 and the access user number larger than the splitting threshold value. Taking fig. 4 as an example, a corresponding incomplete multilevel tree prefix graph is shown in fig. 5. The

prefix

8, 82, 88 are all branch nodes in the figure, and the others are leaf nodes, wherein the prefix 86 does not belong to the local MSP any more because the home migration condition is reached until a new user who starts with 86 accesses the system locally.

Merging the capital heads:

after a period of home evolution, the home relationship of the converged communication service system may be rather fragmented, which puts relay pressure on cross-home calls. Therefore, when the number of the access users of the prefix header is detected to be lower than a certain number, merging of the prefix header can be considered.

The prefix merging process needs to consider the attribution of prefixes, and may need to migrate the same prefix of an off-site attribution to the same switching service platform MSP, and this process needs GSS cooperation.

1. Prefix merging for MSP of same exchange service platform

Referring to the incomplete multi-level tree-shaped prefix graph, if the number of access users of all k + 1-level prefix heads of a certain MSP (mixed-sequence multi-processor) belonging to the same k-level prefix head is smaller than a merging threshold T_meI.e. by

Then merging the k + 1-level prefix heads, and the specific steps are as follows:

step d1, deleting all k + 1-level crown word head leaf nodes headed by the crown word head p;

step d2, using the crown head p as a k-level crown head leaf node;

step d3, updating the MSP number and the access user number of the k-level prefix p, i.e. updating

2. Crown merging of multiple MSPs

The k + 1-level crown heads formed by splitting the k-level crown heads may have attribution migration due to the number of access users, so that situations similar to that 8201, 8202 and 8203 are attributed to the MSP a, 8204, 8205 and 8206 are attributed to the MSP B, and 8207, 8208, 8209 and 8200 are attributed to the MSP C occur. If the four-level prefixes are not subjected to attribution migration, 820 crowns can appear in MSP A, MSP B and MSP C after crown merging, and the 820 crown routing problem can be caused. Theoretically speaking, the effect of merging the k + 1-level prefix can be achieved by firstly migrating and then merging or firstly merging and then migrating. Considering the overhead, a merging-before-migration strategy is proposed, and the specific merging steps are as follows:

step e1, referring to the scene of 'merging crown headers of the same MSP', the GSS performs crown header merging judgment, namely selects k + 1-level crown headers to be merged, which belong to the same k-level crown headers and have the number of accessed users smaller than a merging threshold T_meI.e. by

Step e2, GSS informs related MSP to merge k + 1-level prefix, informing parameters mainly including k-level prefix p and merging instruction;

step e3, referring to the scene of 'crown word head combination of the same MSP', each MSP carries out crown word head combination and sends a combination success message to the GSS;

step e4, the GSS sends the attaching migration destination MSP serial number to each MSP, the MSP with the largest number of users is selected as the migration MSP under the general condition, and the other MSPs are the migration MSPs;

step e5, migrating the MSP to update the number of the access users, and sending a confirmation message to the GSS;

and e6, migrating the MSP to delete the related k-level prefix, and deleting the related k-level prefix entries in the TR table and the TMI table.

(8) Registration procedure

The converged communication terminal adopts domain name registration, and performs domain name resolution and authentication through MSP, and the specific registration flow is shown in fig. 6.

Step f1, terminal registers the EXP request to terminal sub-network;

step f2, the EXP is appropriately processed and is forwarded to the MSP of the terminal roaming place nearby;

step f3, the MSP of the roaming place carries out the resolution of the registered domain name, and sends the domain name inquiry information to the GSS when necessary;

step f4, GSS returns the relevant inquiry information;

step f5, the MSP of roaming place forwards the terminal registration information to the MSP of home place;

step f6, the MSP of the home country returns the registration confirmation information;

step f7, the MSP returns the registration confirmation information;

in step f8, the end subnet EXP returns registration confirmation information.

The present invention provides a method for converged communication affiliation transfer and registration suitable for a narrowband network, and a plurality of methods and ways for implementing the technical solution, where the foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and modifications may be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.

Claims

1. A converged communication attribution transfer and registration method applicable to a narrow-band network is characterized by comprising the following steps:

step 4, the roaming user completes registration;

the step 1 comprises the following steps:

step 1-3, the local registration table TR, the local roaming immigration table TMI and the local roaming immigration table TMO are inquired by adopting a maximum matching priority rule, the local roaming immigration table TMI is inquired at first, and if a crown word head entry matched with a user is found, the unified communication UC terminal is locally registered; secondly, inquiring a local registry TR, if the prefix entry cannot be found, adopting roaming registration, if the prefix entry is found, continuously inquiring the corresponding prefix entry in a local roaming migration table TMO, if the prefix entry is found, indicating that the whole segment of the user number corresponding to the prefix entry is migrated, adopting roaming registration, and if the prefix entry cannot be found, carrying out local registration;

the step 2 comprises the following steps:

step 2-3, establishing an attribution self-adaptive evolution method for attribution migration;

the step 2-3 comprises the following steps:

step 2-3-2, after the edge interaction platform EXP is subjected to necessary processing, forwarding the registration message of the unified communication UC terminal to its home switch service platform MSP, where the necessary processing includes: collecting the registration information of the registered user and recoding;

step 2-3-4, judging whether the IP address of the MSP is contained in the resolved IP address list, and if so, turning to step 2-3-5; if not, turning to the step 2-3-6;

step 2-3-11, ending attribution migration;

the steps 2-3-9 comprise:

step 2-3-9-1, setting a migration threshold T of the number of roaming users accessing into the narrow-band converged communication system through the ith exchange service platform MSP_miAnd a migration overhead margin T;

step 2-3-9-2, calculating the maximum roaming registered user number u_{R_max}And the corresponding access exchange service platform MSP, u_{R_max}＝u_R(j)＝max u_R(i)，j＝argmax u_R(i)，u_R(i) In order to access the number of roaming users entering the narrow-band converged communication system through the ith switching service platform MSP,

step 2-3-9-3, comparing the number u of the local registered users_LAnd u_{R_max}If u is a_{R_max}＞max{T_mi,u_LAnd + T }, executing the step 2-3-10, and transferring the number segment user attribution corresponding to the prefix head to a jth exchange service platform MSP;

the steps 2-3-10 comprise:

2-3-10-3, synchronizing related information to a global subscription system GSS, wherein the related information specifically comprises a crown header which is migrated and an MSP (Mixed Signal processor) related to the crown header;

the step 3 comprises the following steps:

Number of MSP equal to 1 for any exchange service platform, i.e. k-level prefix

Then the attribution migration is carried out on the k-level prefix;

3-3, merging the prefix heads when detecting that the number of the access users of the prefix heads is lower than a set merging threshold;

if the number of the access users of all k + 1-level prefix heads belonging to the same k-level prefix head of one switching service platform MSP is smaller than a merging threshold value T_meI.e. by

step a2, taking the crown head p as a k-level crown head leaf node;

Step b2, the global subscription system GSS notifies the relevant exchange service platform MSP to merge k + 1-level prefix, and the notified parameters include k-level prefix p and a merge instruction;

step b6, the migratory exchange service platform MSP deletes the related k-level prefix, deletes the related k-level prefix entries in the local registry TR and the local roaming migration table TMI;

step 4 comprises the following steps: the converged communication terminal adopts domain name registration, and carries out domain name resolution and authentication through an exchange service platform MSP, and the method specifically comprises the following steps:

4-2, the edge interaction platform EXP is appropriately processed and is forwarded to an exchange service platform MSP of the converged communication terminal roaming place nearby;

step 4-3, the switching service platform MSP of the roaming place carries out the registration domain name resolution and sends domain name inquiry information to the global subscription system GSS when necessary;

step 4-4, the global subscription system GSS returns the relevant query information;

step 4-7, the MSP returns registration confirmation information;