CN102438327A - Group call channel establishment method and system as well as MSC (mobile switching center) - Google Patents
Group call channel establishment method and system as well as MSC (mobile switching center) Download PDFInfo
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- CN102438327A CN102438327A CN2010105006256A CN201010500625A CN102438327A CN 102438327 A CN102438327 A CN 102438327A CN 2010105006256 A CN2010105006256 A CN 2010105006256A CN 201010500625 A CN201010500625 A CN 201010500625A CN 102438327 A CN102438327 A CN 102438327A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/08—User group management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
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Abstract
The invention discloses a group call channel establishment method and a system as well as an MSC (mobile switching center). The method comprises the following steps that: when a user initiates group call service of the same group of IDs (identities) in a local cell, the MSC inquires the states of the group of IDs; when inquiring that the group call service of the group of IDs is established and is in an activated state, the MSC carries out verification on the cell and the user; and if the verification is successful, the MSC reallocates resources to the cell so as to establish group call. According to the invention, when a subscriber reestablishes a group call of the same group of IDs in a cell of which the whole resources are released, the MSC can carry out reprocessing, resource allocation and group call establishment.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate to a kind of group-calling channel method for building up, system and mobile switching centre.
Background technology
GSM-R (GSM-Railway; Railway combined digital mobile communication system) system is the basis, replaces the railway combined digital mobile communication system of existing multiple railway communication and control system with GSM common development, available single platform with GSM (Global System for Mobile Communications, global system for mobile communications) public mobile communication technology.
Voice group call service (Voice Group Call Service; Abbreviate VGCS as) and Voice Broadcast Service (Voice Broadcast Service; Abbreviate VBS as) all be a kind of communication mode of point-to-multipoint, broken through the limitation of point-to-point communication, can set up calling fast.Mobile Origination VGCS/VBS calls out, and network side is accepted this calling.In call handling process; MSC (Mobile Switching Center, mobile switching centre) carries out VGCS/VBS assignment operation for each sub-district in the group call region, distributes and calls out required land circuit resource and idle wireless resource; BSS (Base Station Subsystem; Base station sub-system) receive the VGCS/VBS Assignment Command after, distribute group-calling channel, set up group-calling service.
Carry out in the process in group calling; After the group-calling channel of certain sub-district is set up; Do not support the group calling of A mouth rebuild and the prerequisite of A mouth link sharing under, owing to BSS fault or A mouth resource such as are seized at reason, may cause the group-calling channel of sub-district to be released; Promptly discharge the land circuit resource and the idle wireless resource of this sub-district, and the notification message of this sub-district can be stopped paying out also.
In the land circuit resource of this sub-district and idle wireless resource because after certain abnormal cause all discharged; At this moment; When the user gets into this sub-district again; Initiate mutually on the same group ID and set up when professional, it is as shown in Figure 1 that the user of prior art initiates already present group calling handling process, and this handling process comprises:
Step 101:MS (travelling carriage) initiates to set up mutually the group-calling service of ID on the same group, to BSS subsystem channel request message (CHANNEL REQ);
After step 102:BSS subsystem was received channel request message (CHANNEL REQ), channel was set up and is activated, and sets up Separate Dedicated Control Channel (SDCCH);
After step 103:SDCCH channel was set up and accomplished, the BSS subsystem sent immediate assignment message (IMMEDIATE ASSIGN) to MS;
Step 104:MS is link setup on the SDCCH of assignment channel, sends to BSS and puts asynchronous balance mode (SABM) message, carries type of message in layer three partial content that wherein carry and is " setting up indication ";
Step 105:BSS utilizes unnumbered acknowledge (UA) message that the SABM that MS reports is confirmed;
Step 106:BSS subsystem sends CR (Connect Management ServiceRequest, connection management service request) layer 3 to MSC and sets up message (Complete Lay3 Info), and layer 3 land circuit resource are set up in application;
Step 107:MSC judges that the group calling ID of this foundation exists after receiving the request of foundation, and is in activated state this moment, and at this moment MSC directly refuses this time professional request of setting up;
Step 108:MSC sends clear command (CLEAR COMMAND) message to the BSS subsystem, and indication BSS removes related resource, comprises Radio Resource and A interface resource;
After step 109:BSS discharges resource, return removing to MSC and accomplish message (CLEARCOMPLETE) message, expression is removed resource and is accomplished;
Step 110:BSS is to mobile terminal MS transmitting channel release message (CHANNELRELEASE), and notice MS leaves the SDCCH channel, and this group calling is set up failure and finished.
Through above-mentioned flow process; Owing to after BSS fault or A mouth resource radio channel resource and A interface resource that reason causes certain sub-district such as seized and all discharged; If at this moment there is the contracting terminal user to get into this sub-district, when initiating mutually the group-calling service of ID on the same group, after this group of MSC inquiry ID has set up and is in activated state; Can directly send clear command, stop the user of this sub-district to initiate and join in this group ID business to BSS.After this group-calling service was finished, the user of this sub-district can rebulid group calling.
In sum, in the prior art, after group-calling channel is removed by abnormal cause, in this group calling is finished during this period of time, for the user who wants to add this group calling, can't normally set up or join this group calling, this greatly reduces the service quality of group calling.
Summary of the invention
The technical problem that the present invention solves provides a kind of group-calling channel method for building up, system and mobile switching centre; When the contracted user rebulids mutually the group calling of ID on the same group under a d/d sub-district of whole resources; MSC can handle again, and Resources allocation is set up group calling.
For solving the problems of the technologies described above, the invention provides a kind of group-calling channel method for building up, said method comprises:
When the user initiates mutually the group-calling service of ID on the same group in this sub-district; The state of said group of ID of mobile switching centre (MSC) inquiry; When the group-calling service that inquires said group of ID has been set up and has been in activated state; Verification is carried out in said sub-district and said user, if verification through for redistributing resource and set up group calling in said sub-district.
In addition, said user initiates mutually also to comprise before the group-calling service of ID on the same group:
The group-calling service of said group of ID has been set up and has been in activated state, and after the group-calling channel of said sub-district was set up, the shared resource of the group-calling channel of said sub-district was all discharged because of abnormal cause.
In addition, said MSC carries out verification to said sub-district and said user, if verification is passed through, the legal and said user in promptly said sub-district when contracting validated user, then sends assignment request message to base station sub-system (BSS);
After said BSS receives said assignment request message, carry out group-calling channel resource and distribute, set up group-calling channel.
In addition, said MSC through and said BSS between SCCP (SCCP) link set up, send said assignment request message to said BSS.
In addition, said method also comprises:
Said user initiates mutually the group-calling service of ID on the same group, and said BSS sets up message according to the group calling that said user sends, and sends connection management service request (CR) layer 3 link setup request message to said MSC;
Said MSC inquires about the state of said group of ID according to said CR layer 3 link setup request message, and according to the said CR layer 3 link setup request message that said BSS sends, set up and said BSS between said SCCP link.
In addition, said method also comprises:
After said BSS sets up group-calling channel, reply appointment to said MSC and accomplish message, and send the channel release message that the band group-calling channel is described, notify said user to join said group-calling channel to said user.
The present invention also provides a kind of mobile switching centre, comprising:
The status poll unit is used for when the user initiates mutually the group-calling service of ID on the same group in this sub-district, inquiring about the state of said group of ID;
Verification unit is used for said status poll unit inquiry and knows that the group-calling service of said group of ID has been set up and when being in activated state, verification is carried out in said sub-district and said user;
Resource allocation unit is after being used for said verification unit said sub-district and said user's verification being passed through, for redistributing resource to set up group calling in said sub-district.
The present invention also provides a kind of group-calling channel to set up system, comprises status poll unit, verification unit and resource allocation unit among the MSC, and the group calling among the BSS sets up the unit, wherein:
Said status poll unit is used for when the user initiates mutually the group-calling service of ID on the same group in this sub-district, inquiring about the state of said group of ID;
Said verification unit is used for said status poll unit inquiry and knows that the group-calling service of said group of ID has been set up and when being in activated state, verification is carried out in said sub-district and said user;
Said resource allocation unit is after being used for said verification unit said sub-district and said user's verification being passed through, through sending assignment request message to BSS, for redistributing resource to set up group calling in said sub-district;
Said group calling is set up the unit and is used for, receive said assignment request message after, set up group-calling channel.
In addition, said verification unit is further used for, if the legal and said user in said sub-district is that then said sub-district and said user's verification are passed through when contracting validated user;
Said resource allocation unit is further used for, and after said sub-district and said user's verification were passed through, the SCCP link through having set up between MSC and said BSS sent said assignment request message to said BSS.
In addition, said group calling is set up the unit and also is used for, set up group-calling channel after, reply to assign to said resource allocation unit and accomplish message, and send the channel release message that the band group-calling channel is described to said user, notify said user to join said group-calling channel.
Technical scheme by the invention described above provides can be found out; The present invention has realized that certain sub-district reason such as is seized and caused group-calling channel resource to discharge owing to BSS fault or A mouth resource; After this after this sub-district contracted user initiates mutually the group calling of ID on the same group, MSC inquire about with verification after issue the VGCS/VBS assignment request message, redistribute resource and set up group calling; Make the user in the sub-district add group calling again; And needn't wait until that group calling finishes just to add group calling after the initiation again again, and reduced the influence that brings after group-calling channel is released, guarantee the service quality of group calling.
Description of drawings
Fig. 1 in the prior art owing to after the BSS reason causes group-calling channel and resource to be released, the user initiates mutually the process chart of the group calling of ID on the same group again;
Fig. 2 is the flow chart according to the group-calling channel method for building up of the embodiment of the invention;
Fig. 3 is for setting up the composition sketch map of system according to the group-calling channel of the embodiment of the invention.
Embodiment
Core concept of the present invention provides a kind of group-calling channel method for building up; Make in the sub-district owing to after BSS fault or A mouth resource reason such as seized and cause the whole resources of group call resource to be released; When the user initiates mutually the group-calling service of ID on the same group again in this sub-district; MSC inquire about with checking treatment after, can to distribute the group call resource of this sub-district to set up professional for it, thus guarantee the service quality of group calling.
Based on above-mentioned thought, the invention provides a kind of method for building up of group-calling channel, specifically adopt following technical scheme:
Steps A, the contracted user initiates mutually the group-calling service of ID on the same group in this sub-district;
Group-calling service that step B, MSC judge this group ID has been set up and when being in activated state, said user and said sub-district has been carried out verification, after verification is passed through, then is said cell allocation group call resource.
Wherein, said steps A specifically comprises:
The group-calling service of said group of ID has been set up and has been in activated state; After the group-calling channel of said sub-district is set up; This sub-district reason such as is seized and is caused resource to comprise that radio channel resource and A interface resource all discharge owing to BSS fault or A mouth resource; When user's desire adds this group calling, initiate mutually the group-calling service of ID on the same group.
Said step B specifically comprises:
B1, BSS subsystem send layer 3 link setup request message (Complete Lay3 Info) to MSC;
The state of this group of B2, MSC inquiry ID, if for setting up and being in activated state, further legal the and user of the group call region at this place, sub-district of verification is the validated user of contracting;
B3, MSC send assignment request message (VGCS/VBS ASSIGN REQ) to BSS, and Resources allocation is set up group-calling service;
After B4, BSS receive assignment request message (VGCS/VBS ASSIGN REQ); After setting up group-calling channel; Return appointment to MSC and accomplish message (VGCS/VBS ASSIGN RESULT), send the channel release message (CHANNEL RELEASE) that the band group-calling channel is described to MS afterwards.
Among the said step B3; MSC sends assignment request message (VGCS/VBS ASSIGNREQ) to BSS; Be in step B1, to send SCCP (the SignalingConnection Control Part that layer 3 link setup request message are set up; SCCP) issues on the link, issue and need not rebulid the SCCP link.
Among the said step B4, BSS comprises group-calling channel and describes to MS transmitting channel release message (CHANNEL RELEASE) in this message, and the SDCCH channel is left at the notice terminal, joins group-calling channel, begins to monitor group-calling channel.
For the ease of setting forth the present invention, below will combine accompanying drawing and specific embodiment that the enforcement of technical scheme of the present invention is described in further detail.
Fig. 2 is the method for building up flow chart according to the group-calling channel of the embodiment of the invention, and is as shown in Figure 2, and this flow process specifically describes as follows:
Step 201:MS (travelling carriage) initiates to set up mutually the group-calling service of ID on the same group, to BSS subsystem channel request message (CHANNEL REQ);
Certain sub-district reason such as is seized and is caused the shared resource of group-calling channel of this sub-district all to discharge owing to BSS fault or A mouth resource; Resource comprises idle wireless resource and A mouth land circuit resource; If have the user to want to add this group calling this moment, so initiate the phase group-calling service of ID on the same group.
After step 202:BSS subsystem was received channel request message (CHANNEL REQ), channel was set up and is activated, and sets up Separate Dedicated Control Channel (SDCCH);
After step 203:SDCCH channel was set up and accomplished, the BSS subsystem sent immediate assignment message (IMMEDIATE ASSIGN) to MS;
Step 204:MS is link setup on the SDCCH of assignment channel, sends to BSS and puts asynchronous balance mode (SABM) message, carries type of message in layer three partial content that wherein carry and is " setting up indication ";
Step 205:BSS utilizes unnumbered acknowledge (UA) message that the SABM that MS reports is confirmed;
Step 206:BSS sends CR layer 3 link setup request (Complete Lay3 Info) message to MSC;
After BSS received that message (being the SABM message in the step 204) is set up in group calling that mobile station MS is sent, BSS sent CR layer 3 link setup request (Complete Lay3 Info) message to MSC;
Step 207:MSC inquires about and verification, distributes call resources;
After MSC receives the CR layer 3 link setup request message that BSS sends; At first MSC inquires about the state of this group ID; If this group ID has set up and has been in activated state, carry out verification to initiating sub-district and user afterwards, judge that the group call region at this place, sub-district is legal effectively; And the user is signatory validated user, just distributes call resources to BSS then.
Difference with the prior art of the present invention is; This group ID has set up and when being in activated state, prior art is that MSC directly refuses this this calling, not Resources allocation when inquiring; The present invention then is the verification of initiating sub-district and user, and verification distributes call resources through the back to BSS.
Step 208:MSC sends assignment request message (VGCS/VBS ASSIGN REQ) to BSS;
When MSC inquire about pass through with verification after, send assignment request message (VGCS/VBSASSIGN REQ) to BSS, comprise wherein that this group-calling channel is described and relevant group call resource.This moment, the issuing of assignment request message was in step 206, to send a SCCP that layer 3 link setup request message set up to chain and issue, and multiplexing link from MSC to BSC issues and need not rebulid the SCCP link.
Step 209: group-calling channel is set up;
After BSS receives the assignment request message (VGCS/VBS ASSIGN REQ) that MSC sends, carry out group-calling channel resource and distribute, set up A mouth link circuit resource and Um message road resource respectively.
Step 210:BSS sends to MSC and assigns results messages (VGCS/VBS ASSIGNRESULT);
After the group-calling channel of BSS is set up completion, can send to MSC and assign results messages (VGCS/VBS ASSIGN RESULT), tell the group-calling channel of this sub-district of MSC to set up.
Step 211:BSS sends the channel release message (CHANNELRELEASE) that the band group-calling channel is described to MS;
When BSS to MS transmitting channel release message (CHANNEL RELEASE), the band group-calling channel is described in this message, the SDCCH channel is left at the notice terminal, joins group-calling channel, begins to monitor group-calling channel.
Step 212:BSS is to MS send a notification message (NOTIFICATION);
After the BSS group-calling channel was set up completion, BSS began upward to send a notification message (NOTIFICATION) to MS at notification channel (NCH), and notice terminal group-calling channel is set up.
Step 213:BSS is to MS send a notification message (NOTIFICATION).
The same with step 212, after accomplishing 212 steps, and then BSS goes up at Fast Associated Control Channel (FACCH) and sends a notification message (NOTIFICATION) to MS, and notice terminal group-calling channel is set up.
Further, the embodiment of the invention also provides a kind of group-calling channel to set up system, and is as shown in Figure 3, and this system comprises status poll unit, verification unit and the resource allocation unit among the MSC, and the group calling among the BSS sets up the unit, wherein:
Said status poll unit is used for when the user initiates mutually the group-calling service of ID on the same group in this sub-district, inquiring about the state of said group of ID;
Said verification unit is used for said status poll unit inquiry and knows that the group-calling service of said group of ID has been set up and when being in activated state, verification is carried out in said sub-district and said user;
Said resource allocation unit is after being used for said verification unit said sub-district and said user's verification being passed through, through sending assignment request message to BSS, for redistributing resource to set up group calling in said sub-district;
Said group calling is set up the unit and is used for, receive said assignment request message after, set up group-calling channel.
In addition, said verification unit is further used for, if the legal and said user in said sub-district is that then said sub-district and said user's verification are passed through when contracting validated user;
Said resource allocation unit is further used for, and after said sub-district and said user's verification were passed through, the SCCP link through having set up between MSC and said BSS sent said assignment request message to said BSS.
In addition, said group calling is set up the unit and also is used for, set up group-calling channel after, reply to assign to said resource allocation unit and accomplish message, and send the channel release message that the band group-calling channel is described to said user, notify said user to join said group-calling channel.
In addition, the embodiment of the invention also provides a kind of mobile switching centre, is applied to set up group-calling channel, and referring to Fig. 3, this mobile switching centre mainly comprises:
The status poll unit is used for when the user initiates mutually the group-calling service of ID on the same group in this sub-district, inquiring about the state of said group of ID;
Verification unit is used for said status poll unit inquiry and knows that the group-calling service of said group of ID has been set up and when being in activated state, verification is carried out in said sub-district and said user;
Resource allocation unit is after being used for said verification unit said sub-district and said user's verification being passed through, for redistributing resource to set up group calling in said sub-district.
In sum; After the present invention had realized reason such as being seized owing to BSS fault or A mouth resource and causing all resources to be released in certain sub-district, when the contracted user initiated mutually the group calling of ID on the same group again in this sub-district, MSC inquired about with verification and issues the VGCS/VBS assignment request message; Redistribute resource and set up group calling; Make the contracted user in the sub-district add group calling again, and needn't wait until that group calling finishes just to add group calling after the initiation again again, reduced the influence that brings after group-calling channel is released; Guarantee the service quality of group calling, improve user's perceptibility.
More than be merely preferred case study on implementation of the present invention; Be not limited to the present invention; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
Claims (10)
1. a group-calling channel method for building up is characterized in that, said method comprises:
When the user initiates mutually the group-calling service of ID on the same group in this sub-district; The state of said group of ID of mobile switching centre (MSC) inquiry; When the group-calling service that inquires said group of ID has been set up and has been in activated state; Verification is carried out in said sub-district and said user, if verification through for redistributing resource and set up group calling in said sub-district.
2. the method for claim 1 is characterized in that, said user initiates mutually also to comprise before the group-calling service of ID on the same group:
The group-calling service of said group of ID has been set up and has been in activated state, and after the group-calling channel of said sub-district was set up, the shared resource of the group-calling channel of said sub-district was all discharged because of abnormal cause.
3. according to claim 1 or claim 2 method is characterized in that,
Said MSC carries out verification to said sub-district and said user, if verification is passed through, the legal and said user in promptly said sub-district when contracting validated user, then sends assignment request message to base station sub-system (BSS);
After said BSS receives said assignment request message, carry out group-calling channel resource and distribute, set up group-calling channel.
4. method as claimed in claim 3 is characterized in that,
Said MSC through and said BSS between SCCP (SCCP) link set up, send said assignment request message to said BSS.
5. method as claimed in claim 4 is characterized in that, said method also comprises:
Said user initiates mutually the group-calling service of ID on the same group, and said BSS sets up message according to the group calling that said user sends, and sends connection management service request (CR) layer 3 link setup request message to said MSC;
Said MSC inquires about the state of said group of ID according to said CR layer 3 link setup request message, and according to the said CR layer 3 link setup request message that said BSS sends, set up and said BSS between said SCCP link.
6. method as claimed in claim 3 is characterized in that, said method also comprises:
After said BSS sets up group-calling channel, reply appointment to said MSC and accomplish message, and send the channel release message that the band group-calling channel is described, notify said user to join said group-calling channel to said user.
7. a mobile switching centre is characterized in that, comprising:
The status poll unit is used for when the user initiates mutually the group-calling service of ID on the same group in this sub-district, inquiring about the state of said group of ID;
Verification unit is used for said status poll unit inquiry and knows that the group-calling service of said group of ID has been set up and when being in activated state, verification is carried out in said sub-district and said user;
Resource allocation unit is after being used for said verification unit said sub-district and said user's verification being passed through, for redistributing resource to set up group calling in said sub-district.
8. a group-calling channel is set up system, it is characterized in that, comprises status poll unit, verification unit and resource allocation unit among the MSC, and the group calling among the BSS sets up the unit, wherein:
Said status poll unit is used for when the user initiates mutually the group-calling service of ID on the same group in this sub-district, inquiring about the state of said group of ID;
Said verification unit is used for said status poll unit inquiry and knows that the group-calling service of said group of ID has been set up and when being in activated state, verification is carried out in said sub-district and said user;
Said resource allocation unit is after being used for said verification unit said sub-district and said user's verification being passed through, through sending assignment request message to BSS, for redistributing resource to set up group calling in said sub-district;
Said group calling is set up the unit and is used for, receive said assignment request message after, set up group-calling channel.
9. system as claimed in claim 8 is characterized in that,
Said verification unit is further used for, if the legal and said user in said sub-district is that then said sub-district and said user's verification are passed through when contracting validated user;
Said resource allocation unit is further used for, and after said sub-district and said user's verification were passed through, the SCCP link through having set up between MSC and said BSS sent said assignment request message to said BSS.
10. like claim 8 or 9 described systems, it is characterized in that,
Said group calling is set up the unit and also is used for, set up group-calling channel after, reply to assign to said resource allocation unit and accomplish message, and send the channel release message that the band group-calling channel is described to said user, notify said user to join said group-calling channel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105006256A CN102438327A (en) | 2010-09-29 | 2010-09-29 | Group call channel establishment method and system as well as MSC (mobile switching center) |
| PCT/CN2011/072685 WO2012041048A1 (en) | 2010-09-29 | 2011-04-12 | Method, system and mobile switching center for establishing group call channels |
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| CN2010105006256A CN102438327A (en) | 2010-09-29 | 2010-09-29 | Group call channel establishment method and system as well as MSC (mobile switching center) |
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| CN105208530A (en) * | 2015-09-02 | 2015-12-30 | 哈尔滨海能达科技有限公司 | Group call service processing method, terminal and core network element |
| CN106231619A (en) * | 2016-09-22 | 2016-12-14 | 北京北方烽火科技有限公司 | A kind of community unusual condition processing method and base station control unit |
| CN112312333A (en) * | 2020-11-02 | 2021-02-02 | 深圳市桑达无线通讯技术有限公司 | Group call processing control method for railway special mobile terminal |
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| WO2018202798A1 (en) * | 2017-05-04 | 2018-11-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | UE GROUPS, UE GROUP MANAGER UEs AND UE GROUP MEMBER UEs |
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| WO2003069928A1 (en) * | 2002-02-14 | 2003-08-21 | Qualcomm Incorporated | A method and an apparatus for adding a new member to an active group call in a group communication network |
| CN1968456A (en) * | 2006-04-29 | 2007-05-23 | 华为技术有限公司 | Group-call/multicast establishing method and system |
| CN1885971A (en) * | 2006-07-10 | 2006-12-27 | 华为技术有限公司 | Method and system for service user to join in group-calling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105208530A (en) * | 2015-09-02 | 2015-12-30 | 哈尔滨海能达科技有限公司 | Group call service processing method, terminal and core network element |
| CN106231619A (en) * | 2016-09-22 | 2016-12-14 | 北京北方烽火科技有限公司 | A kind of community unusual condition processing method and base station control unit |
| CN106231619B (en) * | 2016-09-22 | 2019-05-03 | 武汉虹信通信技术有限责任公司 | A kind of cell unusual condition processing method and base station control unit |
| CN112312333A (en) * | 2020-11-02 | 2021-02-02 | 深圳市桑达无线通讯技术有限公司 | Group call processing control method for railway special mobile terminal |
| CN112312333B (en) * | 2020-11-02 | 2021-11-05 | 深圳市桑达无线通讯技术有限公司 | Group call processing control method for railway special mobile terminal |
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| WO2012041048A1 (en) | 2012-04-05 |
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