CN108076449A - Emmergency call method, trunked communication system, base station and control device - Google Patents
Emmergency call method, trunked communication system, base station and control device Download PDFInfo
- Publication number
- CN108076449A CN108076449A CN201711299174.2A CN201711299174A CN108076449A CN 108076449 A CN108076449 A CN 108076449A CN 201711299174 A CN201711299174 A CN 201711299174A CN 108076449 A CN108076449 A CN 108076449A
- Authority
- CN
- China
- Prior art keywords
- call
- terminal
- base station
- sent
- request signaling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
Abstract
The present invention relates to a kind of Emmergency call method, trunked communication system, base station and control device, this method includes：Base station receives the second call request signaling that terminal is sent, and is connected according to the second call request signaling with terminal；After control device is connected in base station with terminal, receive the second call request signaling that the terminal of base station transmission is sent, and it is made according to the second call request and determines sharing channel corresponding with the second call request signaling, and sharing channel is sent to terminal by base station, which is occupied with instruction terminal；Sharing channel in order to control after the first call request signaling of terminal transmission is received, according to the first call request signaling establish and the sharing channel after being cached by device；Control device is sent to dispatching desk after sharing channel corresponding with the second call request signaling is determined, by the second call request signaling, and dispatching desk is established according to the second call request signaling and called.Implement the present invention to reduce call delay, avoid repeating to establish calling passage.
Description
Technical field
The present invention relates to cluster communication field, more specifically to a kind of Emmergency call method, trunked communication system,
Base station and control device.
Background technology
In existing cluster private network, call conversation mainly inputs number by terminal, and is all first by base station
Control access is carried out being passed to cluster core net after reason, and the flow of urgent call and ordinary call is essentially identical；And for
In wide and narrow strip cluster private network, air interface transmission and the IP (Internet Protocol, procotol) for having line end route consumption
Time delay accounting in entire call setup is bigger.And the delay requirement of urgent call then higher.
Urgent call is a kind of special calling type for requiring time delay low less, in current urgent call calling do not have to picture
Ordinary call will dial like that, this is it is avoided that in case of emergency due to the time consumption that brings of dialling；And in special feelings
Under condition, the frequency of urgent call is very high, urgent call at this time with ordinary call be from the point of view of core-network side as call-flow
Journey.
Special flow processing is not done in urgent call also in current technology, at core net
The uniformity of calling is managed, ordinary call and urgent call are handled together, processing is simple, and control is easy.
It is mainly the urgent call scheme of broadband cluster in private network for urgent call, the scheme of these urgent calls
The prior art key technology the characteristics of it is as described below：
1. in existing urgent call, core net is connected into again by base station as ordinary call, scheduling is finally linked into
Platform.When core net handles urgent call or ordinary call, core net is required for application media resource to lead to for user's communication foundation
Road.
If 2. the inadequate resource of core net, for example, the control block deficiency of business, Internet resources, memory, CPU (CPU,
Central Processing Unit, central processing unit) processing capacity etc.；Core net will remove that priority is low to exhale at this time
Call the foundation for ensureing urgent call.
3. after this urgent call, core net and base station will discharge the calling link of whole system and call
Resource, such as memory.If to initiate urgent call again, must just be resettled once according to urgent call flow before.
The major defect of the prior art is as follows：
1. when in entire call flow by normal foundation calling, the time delay of calling is long；Every time establish calling when
Prolong equally long with first time；
2. when the call business of group system is busy, during the inadequate resource of calling, ordinary call resource is first removed, then is built
Vertical urgent call.It is long that this also results in emergency call time.And in case of emergency ordinary call can be caused often to fail；
3. it is a little more to establish the signaling transmitted in the flow of urgent call, this can cause TCN (Trunking Media
Function, cluster core net) in the CPU of server where network element increase load.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of the prior art, provides a kind of urgent call side
Method, trunked communication system, base station and control device.
The technical solution adopted by the present invention to solve the technical problems is：Construct a kind of urgent call of trunked communication system
Method, this method comprise the following steps：
A, base station receives the second call request signaling that terminal is sent, according to the second call request signaling and the end
End connection, the second call request signaling carry type of call mark and terminal iidentification；
B, after control device is connected in the base station with the terminal, the terminal transmission of the base station transmission is received
Second call request signaling, and share corresponding with the second call request signaling is determined according to second call request order
Passage, and the sharing channel is sent to the terminal by the base station, to indicate that the terminal occupies the sharing channel；
The sharing channel is the control device after the first call request signaling that the terminal is sent is received, root
The sharing channel established and cached according to the first call request signaling；
C, the control device is after sharing channel corresponding with the second call request signaling is determined, by described second
Call request signaling is sent to dispatching desk, and the dispatching desk establishes calling passage according to the second call request signaling.
Preferably, the step A includes：
A1, the base station receive the second call request signaling that the terminal is sent, and are believed according to second call request
The type of call mark that order carries judges whether the second call request signaling is emergency call, if so, according to terminal
Type of call be connected with the terminal, and establish the related information of the base station and the terminal；
A2, the base station are based on the terminal iidentification, and emergency call is sent to the control device；It is described promptly to exhale
Signaling is made to carry the terminal iidentification and related information.
Preferably, the step B includes：
B11, the control device receive the emergency call that the base station is sent, according to the terminal iidentification determine with
The corresponding sharing channel of the terminal iidentification；
B12, sharing channel corresponding with the terminal iidentification is distributed into the terminal.
Preferably, the control device includes：Mobility management entity module, clustered control function module and dispatch service
Device；
The step B includes：
B21, the mobility management entity module receive the emergency call, according to the terminal iidentification determine with
The corresponding control block of the terminal iidentification；The control block is to be stored in the mobility management entity mould control block in the block；
B22, sharing channel corresponding with the terminal iidentification is determined by the control block, and the sharing channel is divided
Terminal described in dispensing；
B23, clustered control function module corresponding with the terminal iidentification is determined by the control block, and will be described tight
Anxious call signaling is sent to the clustered control function module；
The emergency call is sent to the dispatch server by B24, the clustered control function module.
Preferably, the step C includes：
The emergency call is sent to dispatching desk by C11, the dispatch server；
C12, the dispatching desk receive and process the emergency call, and establish calling passage with dispatch server.
Preferably, the method further includes：
D, after dispatching desk establishes calling passage according to the second call request signaling, return and call to the control device
The response message being successfully established；
E, the successful response message of the call setup is returned to the base station by the control device；
F, the base station receives and the successful response message of the call setup is returned to the terminal.
Preferably, the sharing channel includes multiple sharing channels, and the service quality of each sharing channel is
It is highest.
The present invention also provides a kind of trunked communication systems, including terminal, base station, control device and dispatching desk, the end
End, base station, control device and dispatching desk are connected by network communication, are used to implement the urgent of above-mentioned trunked communication system and are exhaled
It is method.
The present invention also provides a kind of Emmergency call methods of trunked communication system, the described method comprises the following steps：
Base station receives the second call request signaling that terminal is sent, and according to the second call request signaling and the end
End connection, the second call request signaling carry type of call mark and terminal iidentification；
After the base station is connected with the terminal, the second call request signaling that the terminal is sent is sent to control dress
It puts；
The base station receives the sharing channel corresponding with the second call request signaling that the control device is sent, and
The sharing channel is sent to the terminal, to indicate that the terminal occupies the sharing channel, realize the terminal with it is described
The call setup of control device；
The sharing channel is the control device after the first call request signaling that the terminal is sent is received, root
The sharing channel established and cached according to the first call request signaling.
Preferably, the base station receives the second call request signaling that terminal is sent, and according to second call request
The step of signaling is connected with the terminal includes：
The base station receives the second call request signaling that the terminal is sent, and is taken according to the second call request signaling
The type of call mark of band judges whether the second call request signaling is emergency call, if so, exhaling according to terminal
Type is made to be connected with the terminal, and establishes the related information of the base station and the terminal；
The base station is based on the terminal iidentification, and emergency call is sent to the control device；The urgent call
Signaling carries the terminal iidentification and related information.
The present invention also provides a kind of base station, including first processor, first memory and first communication module, wherein,
The first communication module, for communicating with control device and terminal；
The first memory, for storing program instruction；
The first processor is arranged to call described program instruction, performs trunked communication system as described above
Emmergency call method.
The present invention also provides a kind of Emmergency call methods of trunked communication system, the described method comprises the following steps：
Control device receives the second call request signaling that the terminal of base station transmission is sent, and please according to the described second calling
Signaling is asked to determine sharing channel corresponding with second demand signalling；
The sharing channel is sent to the base station, the sharing channel is sent to by the end by the base station
End, to indicate that the terminal occupies the sharing channel；
The sharing channel is the control device after the first call request signaling that the terminal is sent is received, root
The sharing channel established and cached according to the first call request signaling；
The control device is exhaled after sharing channel corresponding with the second call request signaling is determined by described second
Demand signalling is made to be sent to dispatching desk, is established and called by the second call request signaling and the dispatching desk.
Preferably, the method further includes：
The control device receives the successful response message of call setup that the dispatching desk returns；
The successful response message of the call setup is sent to the base station by the control device, will by the base station
The successful response message of call setup is sent to the terminal, completes call setup.
The present invention also provides a kind of control device, including second processor, second memory and second communication module,
In,
The second communication module, for communicating with base station and dispatching desk；
The second memory, for storing program instruction；
The second processor is arranged to call described program instruction, performs trunked communication system as described above
Emmergency call method.
Implement the Emmergency call method of the trunked communication system of the present invention, have the advantages that：The cluster of the present invention
Emmergency call method is occupied compared with multi-time Delay except need to establish urgent call for the first time, and subsequent urgent call is not since for the second time
Urgent call link need to be re-established again, greatly reduce the time delay for establishing calling；The transmission of signaling is also reduced simultaneously, is improved
Call speed is also avoided removing original ordinary call link due to media and control inadequate resource, promoted as far as possible
The quality of calling is also assured while call delay.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is the call flow diagram of first time urgent call in trunked communication system；
Fig. 2 is the flow diagram of the Emmergency call method of trunked communication system of the present invention；
Fig. 3 is trunked communication system organization chart of the present invention；
Fig. 4 is the call flow diagram since second of urgent call of trunked communication system of the present invention；
Fig. 5 is the urgent call scene setting figure of trunked communication system of the present invention；
Fig. 6 is the flow diagram of another embodiment of Emmergency call method of trunked communication system of the present invention；
Fig. 7 is a kind of structure diagram of base station of the present invention；
Fig. 8 is the flow diagram of the another embodiment of Emmergency call method of trunked communication system of the present invention；
Fig. 9 is a kind of structure diagram of control device of the present invention.
Specific embodiment
In order to which the technical features, objects and effects to the present invention are more clearly understood, now compare attached drawing and be described in detail
The specific embodiment of the present invention.
Fig. 2 is the flow diagram of the Emmergency call method of trunked communication system of the present invention, in this embodiment, control dress
It is the cluster core net (TCN) in trunked communication system to put, and specifically, the urgent of the trunked communication system of the present embodiment is exhaled
Method is made to comprise the following steps：
A, base station receives the second call request signaling that terminal is sent, and is connected according to the second call request signaling with terminal,
Second call request signaling carries type of call mark and terminal iidentification.
In the step, the second call request signaling can be the calling (including for the second time) after terminal starts since second
Demand signalling.Wherein, needed when terminal initiates call request to base station and base station is established signalling path and must just be carried out wirelessly
Resources control establishment of connection (i.e. RRC Connect Setup), while in the connection procedure of RRC, the request of terminal transmission
Signaling carries the type of call mark and terminal iidentification of terminal, wherein, type of call mark can be used for transmitted by identification terminal
Demand signalling type (such as urgent call, ordinary call, audio call or audio and video calling)；Type of call mark can
It is identified and (is such as identified with 01,10 fields) by corresponding position in the signaling.Terminal iidentification can be used for identification eventually
End, such as terminal A or terminal B send call request signaling to base station, after base station receives call request signaling, pass through terminal
Terminal iidentification can identify that terminal A or terminal B are sent to call request signaling；Terminal iidentification can also use
Corresponding field represents, such as 0001 GC group connector A, 00010 GC group connector B etc..It should be noted that the mark for terminal
Knowledge may be employed different modes and be identified, however it is not limited to above-mentioned specific example.
Further, the present embodiment is applicable to the trunked communication system of multiple terminals and multiple base stations, i.e. the present embodiment
Terminal and base station may each comprise it is multiple.
Optionally, in the present embodiment, step A can include step A1 and step A2.
Step A1, base station receives the second call request signaling that terminal is sent, and is carried according to the second call request signaling
Type of call mark judges whether the second call request signaling is emergency call, if so, according to the type of call of terminal and
Terminal connects, and establishes the related information of base station and terminal.
It in this step, first please according to the second calling after base station receives the second call request signaling of terminal transmission
The type of call that signaling carries is asked to be judged, to determine that the type of call of terminal (is, for example, that ordinary call is still promptly exhaled
It cries)；If judging, the type of call of terminal for urgent call, is established with terminal and connected.
Base station and the specific of terminal are connected as：When base station determine terminal type of call be urgent call when, base station according to
The emergency call type of terminal by the signaling of the side of eating dishes without rice or wine between terminal (the second call request signaling that i.e. terminal is sent) and
Media link and wired sidelinks of control side are associated mapping (related information for establishing base station and terminal), pass through progress
Relationship maps swap terminal media information at this time and the media information of base station, so that the media of terminal and base station
Media channel be connected, complete the connection of the signaling of base station and terminal.
Step A2, base station is based on terminal iidentification, and emergency call is sent to control device；Emergency call carries
Terminal iidentification and related information.
In step A1 implementation procedures, base station performs step A2 simultaneously, i.e. step A1 and step A2 can be performed synchronously.Base
Standing will (during relationship maps are established in base station with terminal) while the second call request signaling of terminal transmission is received
The terminal iidentification carried in second call request signaling extracts, and emergency call is sent to control.Wherein, urgent call
The related information carried in signaling include but not limited to the address information of terminal, the media information of terminal, terminal type of call,
The correspondence of terminal and base station, the address information of base station, the media information etc. of base station.
It is to be appreciated that when the second call request signaling that terminal transmission is judged in step A1 is not urgent call (example
Such as ordinary call) when, then base station does not send emergency call to control device, which will not occupy urgent call
Passage.
B, after control device is connected in base station with terminal, the second call request letter that the terminal of base station transmission is sent is received
Order, and made according to the second call request and determine sharing channel corresponding with the second call request signaling, and sharing channel is passed through
Base station is sent to terminal, and the sharing channel is occupied with instruction terminal.
Optionally, sharing channel can be set a plurality of, and the service quality of each sharing channel is disposed as the superlative degree.
Wherein, the quantity that sharing channel is set can be configured according to the number of users (i.e. the quantity of urgent call) that base station is accessed, when
The number of users of base station access can accordingly increase the quantity of sharing channel when more, can be corresponding when the number of users of base station access is less
Reduce the quantity of sharing channel.
Since the service quality of different terminals requirement is different, it can be when establishing sharing channel by sharing channel
Service quality is arranged to highest, so as to ensure that all services can communicate according to the requirement of terminal.
Wherein, device is after the first call request signaling of terminal transmission is received in order to control for sharing channel, according to first
Call request signaling is established and the sharing channel after being cached.
Specifically, as shown in Figure 1, Fig. 1 is the call flow diagram of first time urgent call in trunked communication system；First,
It establishes before urgent call, first adhered to and registers (i.e. in broadband side：Base station (eNB), mobility management entity module
(MME), the network elements such as cluster gateway (XGW) are registered in clustered control function module (TCF) again after successfully being adhered to
After could establish calling connection)
After the completion of attachment and registration, terminal (UE) sends call request (Call to clustered control function module (TCF)
Request), i.e., shown in signaling 1 to signaling 3, clustered control function module (TCF) will be to cluster matchmaker after receiving call request
Body function module (TMF) applies for media resource, and the signaling of request call is sent to dispatching desk server (DCS), hereafter adjusts
Degree platform server (DCS) will send a request to DC, i.e. signaling 4 to signaling 5.
Dispatching desk server (DCS) has received and processed whole to UE by TCF, MME, eNB after the call request signaling of TCF
End sends Ringing message, i.e. signaling 6 to signaling 11, and notification triggers MME establishes call-specific in LTE (mobile network) broadband side
Carrying.
And when DC dispatching desks receive the call request signaling that DCS is sended over, after being handled, exhaled to DCS transmissions
The response 200OK (i.e. signaling 8) that request is made to receive, DCS can be successful to DC transmission call setups after handling 200OK message at this time
The confirmation message (signaling 9) of response, while the response for receiving setup requests is transmitted to UE by TCF and MME and eNB,
That is signaling 12 to 15.
After UE processing, the confirmation message that successfully responds of call setup is sent to TCF by eNB and MME, i.e., signaling 16 to
Signaling 18.
In whole flow process：
(1) after TCF receives call request message i.e. signaling 3 of MME transmissions, it will apply for caller to TMF and be called
TMF media resources, then called TMF resource informations are sent to by DC by signaling 4 and 5, then by signaling 8 and 12 by the matchmaker of DC
Body resource is sent to TMF, and so far TMF is exchanged successfully with the media information of DC.
(2) after TCF receives call request message i.e. signaling 3 of MME transmissions, it will apply for caller to TMF and be called
TMF media resources, then the TMF media resources of caller are sent to by MME by signaling 7, triggering MME establishes the proprietary of calling and holding
It carries, and bearing resource information is sent to TCF by signaling 18, and then be sent to TMF, at this time matchmaker between TMF and XGW and eNB
Body resource establishes exchange.So as to get through the media links from UE to DC.
After end of calling, in entire calling system, only discharge terminal between base station eat dishes without rice or wine to link and dispatching desk
Link between server and dispatching desk, and in intermediate base station, mobility management entity module, cluster gateway, clustered control
IP links between function module, cluster media function module and dispatching desk server do not discharge, i.e., as shown in figure 3, base station
It is not discharged with the urgent call link inside control device and control device, and using the urgent call link established as altogether
It enjoys passage to be cached, using the media link as subsequent emergency call.It is to be appreciated that sharing channel can be received according to base station
Number of users set it is a plurality of.
Optionally, in the present embodiment, step B can include：
B11, control device receive the emergency call that base station is sent, and are determined according to terminal iidentification corresponding with terminal iidentification
Sharing channel.
Due to the intermediate server portion of the urgent call passage according to first time urgent call (initial urgent call) foundation
Resource in the link of door does not discharge, when carry out second, third time ..., n-th urgent call when can reuse
The urgent call passage initially set up.Therefore, when control device receives the emergency call of base station transmission, i.e., according to tight
The terminal iidentification carried in anxious call signaling searches sharing channel corresponding with terminal iidentification in the sharing channel cached, no
New urgent call passage need to be established further according to this emergency call.
B12, sharing channel corresponding with terminal iidentification is distributed into terminal.
Optionally, as shown in figure 3, the control device of the present embodiment can include mobility management entity module, collection team control
Function module processed and dispatch server.Wherein, mobility management entity module, clustered control function module and dispatch server are used
In execution following steps：
B21, mobility management entity module receive emergency call, are determined according to terminal iidentification corresponding with terminal iidentification
Control block.
Wherein, control block is to be stored in mobility management entity mould control block in the block.It is to be appreciated that in the present embodiment
In, control block can be realized by corresponding memory, wherein, link information, the terminal of sharing channel are preserved in control block
Information, the information of base station, after control block corresponding with terminal iidentification is found, according to the information preserved in control block
Determine sharing channel corresponding with the terminal iidentification.
B22, sharing channel corresponding with terminal iidentification is determined by control block, and sharing channel is distributed into terminal.
When determine sharing channel corresponding with terminal iidentification after, which is distributed into terminal, so make terminal and
Entire sharing channel is attached.
B23, clustered control function module corresponding with terminal iidentification is determined by control block, and emergency call is sent out
Give the clustered control function module.
Emergency call is sent to dispatch server by B24, clustered control function module.
C, control device is after sharing channel corresponding with the second call request signaling is determined, by the second call request signaling
Dispatching desk is sent to, dispatching desk is established according to the second call request signaling and called.
Optionally, in the present embodiment, step C can include step C11 and step C12.
Emergency call is sent to dispatching desk by C11, dispatch server；
C12, dispatching desk receive and process emergency call, and establish and call with dispatch server.
Specifically, after dispatch server receives emergency call, which is sent to dispatching desk,
Dispatching desk is handled according to the emergency call received, establishes calling, that is, complete dispatching desk server and dispatching desk it
Between connection.
Further, the Emmergency call method of the trunked communication system of the present embodiment can also comprise the following steps：
D, after dispatching desk establishes calling according to the second call request signaling, return to call setup to control device and successfully ring
Answer message；
E, the successful response message of call setup is returned to base station by control device；
F, base station receives and the successful response message of call setup is returned to terminal.
The foundation of second or second of later urgent call can be completed according to above step.
By the above method, when urgent call is established in solution, the delay problem of foundation, and simplify urgent call foundation
Flow, this programme reduce repetition foundation and the signalling of media link, due to reuse for the first time establish sharing channel and
The resource of each network element retains in control device during foundation, and then reduces the effect for rebuilding link, reduces urgent
The time delay of calling；It solves in emergency circumstances network element resources deficiency and removes ordinary call to discharge resource for urgent call foundation use
The problem of, since shared link is reserved for urgent call, ordinary call cannot use this programme, so resource is not present not
Foot and remove before ordinary call the problem of, maximum possible avoid because media and control inadequate resource due to remove it is original general
Logical call link.
Refering to Fig. 4, Fig. 4 is the call flow diagram since second of urgent call of trunked communication system of the present invention.
As shown in figure 4, after completion and end of conversation are established in first time urgent call, due to intermediate sharing channel (base
Stand and the media channel and resource in control device) do not discharge, so being established for the first time when subsequent urgent call can utilize
Sharing channel quickly establish new urgent call again.
Specifically, after the first urgent call, sharing channel has been established in system at this time, when terminal is initiated to exhale to base station
Crying needs to establish signalling path with base station and must just carry out wireless heterogeneous networks establishment of connection (i.e. RRC Connect during request
Setup), while in the connection procedure of RRC, the demand signalling (second of call request signaling) that terminal is sent carries terminal
Type of call mark and terminal iidentification, after base station receives call request signaling, according to the emergency call type of terminal will
The signaling of side of eating dishes without rice or wine and wired sidelinks of media link and control device side do a relationship maps, the purpose of this mapping
It is to do terminal media information at this time with the media information of base station once to exchange so that the media of terminal and the matchmaker of base station
Body passage is connected；
Terminal iidentification in second of call request signaling can be extracted during mapping and pass through letter by base station
2 (emergency calls) is made to be sent to mobility management entity module (MME), MME receives emergency call and navigates to
(wherein, which is that MME passes through end when receiving urgent call for the first time to control block corresponding with the emergency call
End identifies to establish the call control block of MME, and urgent call below can before be had built up by terminal iidentification to position
Control block, and then terminal is attached with entirely shared passage；) after, it notifies to adjust by clustered control function module (TCF)
Degree platform server (DCS) establishes media channel, i.e. signaling 3 and signaling 4 with dispatching desk (DC), when the calling passage of DCS and DC is built
After standing successfully, DCS will by TCF MME send call setup success response to eNB, and send this response to terminal
(UE)。
It should be noted that the signaling 1, signaling 9 and signaling 10 in Fig. 4 are that media channel is established between UE and eNB
Flow, this flow and signaling 2 to signaling 4 are carried out at the same time.When the response of DCS sides is successfully established calling, UE and base
The media channel stood also just is completed.
It is to be appreciated that primarily to get through the media channel between terminal and base station in above-mentioned whole flow process, with
And the media channel between dispatching desk server and dispatching desk, and the media channel between base station and dispatching desk server is therewith
Between do not have release calling media channel share.
The present invention also provides a kind of trunked communication system, including terminal, base station, control device and dispatching desk, terminal, base
Stand, control device and dispatching desk are connected by network communication, be used to implement the urgent call side of above-mentioned trunked communication system
Method.
As shown in figure 3, when urgent call is established for the first time, the flow of foundation is as shown in Figure 1, still when this urgent call
After, in entire calling system only release terminal between base station eat dishes without rice or wine to link and dispatching desk server and dispatching desk
Between link, and in intermediate base station (eNB), mobility management entity module (MME), cluster gateway (XGW), clustered control
IP links between function module (TCF), cluster media function module (TMF) and dispatching desk server (DCS) do not discharge, and
And the terminal iidentification for being sent to MME by eNB at this time can use a general terminal mark divided exclusively for urgent call
Know.
Therefore, the resource in the link of the intermediate server department for the urgent call passage established for the first time does not discharge, when the 2nd
The link that the urgent call of secondary or later n-th can reuse as black overstriking marks in Fig. 3 is quickly established
Urgent call.
Wherein, in figure 3 the money occupied in advance in the link of black thickened portion mark and the network element of link connection
Source has as follows：
Bearing tunnel resource：After the link of urgent call is established for the first time, the GTP bearing resources between eNB and XGW；
IP and Port resources：Media between IP and Port resources and TMF and DCS and IP between XGW and TMF and
Port resources；
The memories such as the control block in each network element：Among these just include eNB in preemption memory, MME XGW TCF TMF
The memory source of the control block of DCS dispatching desk servers.
The above resource will not discharge, and so as to be when playing urgent call again below, reuse the offer of these resources
Resource guarantee.Therefore, after urgent call is established for the first time, behind to beat urgent call these resources again be that will not discharge
, and these resources aim at urgent call and prepare, so as to ensure that the reliability of urgent call, and without worry system
There is no resource and to go to remove ordinary call to ensure the foundation of urgent call.
This reserved media resource and hardware resource are definite to weigh according to actual number of users and urgency level
's；Such as when urgent special circumstances often occur for an area, and the quantity of user is big, then this regional urgent call
Sharing channel (i.e. black overstriking mark part in Fig. 3) can reserve it is a plurality of, can also be reserved according to different business it is a plurality of,
For example, each base station can establish several such preemption links, when such base station is relatively more, then TCF TMF MME
The passage of XGW can also increase a plurality of, when the business need for needing emergency speech or urgent audio and video, then can establish audio
With the sharing channel of the multiclass such as audio and video.If the service quality of demanding terminal is unclear, can be incited somebody to action when establishing urgent call
QoS is arranged to the superlative degree, this ensures that all services can communicate according to the requirement of terminal.
Refering to Fig. 5, Fig. 5 is the urgent call scene setting figure of trunked communication system of the present invention.Specific scene setting is such as
Shown in Fig. 5：When the user of the terminal under the A of base station is carrying out ordinary call, and the terminal user under the B of base station be then carry out it is urgent
Calling, the processing capacity of cluster core net is close to saturation at this time.
In this case, if several users under base station A and base station B will carry out urgent call, it is present at this time
Following several scenes：
(1) urgent call is not got through；
(2) when carrying out ordinary call again, can not carry out；
(3) when establishing urgent call, overlong time, and every time carry out urgent call when, be required for for a long time.
Possibility situation more than generation, can mainly be thought as：The processing capacity of core net is inadequate so that the CPU of core net
Or low memory etc.；When carrying out urgent call, if the inadequate resource of core net, ordinary call, then profit are first removed
Urgent call is established with the ordinary call resource of release, results in that establish emergency call time long；It is excellent due to urgent call
First grade is high, then when carrying out ordinary call, since the priority of ordinary call is the same, results in ordinary call due to inadequate resource
Can not carry out；Since the flow that each urgent call is established is the same, cause to establish urgent call time delay every time big.
When the Emmergency call method of trunked communication system using the present invention, when the urgent call under the A of base station is not very
It is more, the quantity for establishing urgent sharing channel can be set to could be provided as 3, and the urgent call of base station B is more, respective base station
The urgent call sharing channel of B could be provided as 6, therefore, terminate after urgent call is established for the first time, and need to carry out again
During urgent call, to establish the time delay of urgent call greatly using the sharing channel for the urgent call for pre-establishing and caching
Shorten, and the situation that urgent call will not be caused not get through, due to urgent call flow than the prior art process simplification
It is many so that the resources of core network of urgent call consumption below is greatly reduced so that ordinary call as far as possible into
Work(is got through.
Refering to Fig. 6, Fig. 6 is a kind of stream of another embodiment of the Emmergency call method of trunked communication system provided by the invention
Journey schematic diagram.
As shown in fig. 6, the Emmergency call method of the trunked communication system of the present embodiment comprises the following steps：
S61, base station receive the second call request signaling that terminal is sent, and are connected according to the second call request signaling and terminal
It connects, the second call request signaling carries type of call mark and terminal iidentification.
In the step, the second call request signaling can be the calling (including for the second time) after terminal starts since second
Demand signalling.Wherein, needed when terminal initiates call request to base station and base station is established signalling path and must just be carried out wirelessly
Resources control establishment of connection (i.e. RRC Connect Setup), while in the connection procedure of RRC, the request of terminal transmission
Signaling carries the type of call mark and terminal iidentification of terminal, wherein, type of call mark can be used for transmitted by identification terminal
Demand signalling type (such as urgent call, ordinary call, audio call or audio and video calling)；Type of call mark can
It is identified and (is such as identified with 01,10 fields) by corresponding position in the signaling.Terminal iidentification can be used for identification eventually
End, such as terminal A or terminal B send call request signaling to base station, after base station receives call request signaling, pass through terminal
Terminal iidentification can identify that terminal A or terminal B are sent to call request signaling；Terminal iidentification can also use
Corresponding field represents, such as 0001 GC group connector A, 00010 GC group connector B etc..It should be noted that the mark for terminal
Knowledge may be employed different modes and be identified, however it is not limited to above-mentioned specific example.
Optional step S61 can include step S611 and step S612.
Step S611, base station receives the second call request signaling that terminal is sent, and is carried according to the second call request signaling
Type of call mark judge whether the second call request signaling is emergency call, if so, the type of call according to terminal
It is connected with terminal, and establishes the related information of base station and terminal.
Base station and the specific of terminal are connected as：When base station determine terminal type of call be urgent call when, base station according to
The emergency call type of terminal by the signaling of the side of eating dishes without rice or wine between terminal (the second call request signaling that i.e. terminal is sent) and
Media link and wired sidelinks of control side are associated mapping (related information for establishing base station and terminal), pass through progress
Relationship maps swap terminal media information at this time and the media information of base station, so that the media of terminal and base station
Media channel be connected, complete the connection of the signaling of base station and terminal.
Step S612, base station is based on terminal iidentification, and emergency call is sent to control device；Emergency call carries
There are terminal iidentification and related information.
The related information carried in emergency call includes but not limited to the media letter of the address information of terminal, terminal
Breath, the type of call of terminal, terminal and the correspondence of base station, the address information of base station, the media information etc. of base station.
It is to be appreciated that when the second call request signaling for judging terminal transmission is not urgent call (such as ordinary call)
When, then base station does not send emergency call to control device, which will not occupy urgent call passage.
After S62, base station and terminal connection, the second call request signaling that terminal is sent is sent to control device.
The sharing channel corresponding with the second call request signaling that S63, base station receiving control device are sent, and will be shared logical
Road is sent to terminal, occupies the sharing channel with instruction terminal, realizes the call setup of terminal and control device.
It should be noted that device is receiving the first of terminal transmission to the sharing channel that is received of base station in order to control
After call request signaling, according to the foundation of the first call request signaling and the sharing channel cached.Optionally, sharing channel can
It is a plurality of to set, and the service quality of each sharing channel is disposed as the superlative degree.Wherein, the quantity that sharing channel is set can
Be configured with the number of users (i.e. the quantity of urgent call) accessed according to base station, when base station access number of users it is more when can phase
The quantity of sharing channel should be increased, the quantity of sharing channel can be accordingly reduced when the number of users of base station access is less.
Since the service quality of different terminals requirement is different, it can be when establishing sharing channel by sharing channel
Service quality is arranged to highest, so as to ensure that all services can communicate according to the requirement of terminal.
Refering to Fig. 7, Fig. 7 is a kind of structure diagram of one embodiment of base station provided by the invention.
In the implementation, base station 700 can include：
First processor 71, first memory 73 and first communication module 72, wherein,
First communication module 72, for communicating with control device and terminal.
First memory 73, for storing program instruction.
First processor 71 is arranged to caller instruction and performs following steps：
The second call request signaling that terminal is sent is received, and is connected according to the second call request signaling with terminal, second
Call request signaling carries type of call mark and terminal iidentification.
After being connected with terminal, the second call request signaling that terminal is sent is sent to control device.
The sharing channel corresponding with the second call request signaling that receiving control device is sent, and sharing channel is sent to
Terminal occupies the sharing channel with instruction terminal, realizes the call setup of terminal and control device.
Device, please according to the first calling after the first call request signaling of terminal transmission is received in order to control for sharing channel
The sharing channel that signaling is asked to establish and is cached.
Further, first processor 71 is arranged to the specific execution following steps of caller instruction：
The second call request signaling that terminal is sent is received, the type of call carried according to the second call request signaling identifies
Judge whether the second call request signaling is emergency call, if so, being connected according to the type of call of terminal with terminal, and is built
Vertical base station and the related information of terminal.
Based on terminal iidentification, emergency call is sent to control device；Emergency call carry terminal iidentification and
Related information.
Refering to Fig. 8, Fig. 8 is a kind of stream of the another embodiment of the Emmergency call method of trunked communication system provided by the invention
Journey schematic diagram.
As shown in figure 8, the Emmergency call method of the trunked communication system of the present embodiment comprises the following steps：
S81, control device receive the second call request signaling that the terminal of base station transmission is sent, and please according to the second calling
Signaling is asked to determine sharing channel corresponding with the second demand signalling.
S82, sharing channel is sent to base station, sharing channel is sent to by terminal by base station, is occupied with instruction terminal
The sharing channel.
Device, please according to the first calling after the first call request signaling of terminal transmission is received in order to control for sharing channel
The sharing channel that signaling is asked to establish and is cached.
S83, control device believe the second call request after sharing channel corresponding with the second call request signaling is determined
Order is sent to dispatching desk, is established and called by the second call request signaling and dispatching desk.
Optionally, this method is further comprising the steps of：
S84, control device receive the successful response message of call setup that dispatching desk returns.
The successful response message of call setup is sent to base station by S85, control device, by base station that call setup is successful
Response message be sent to terminal, complete call setup.
Refering to Fig. 9, Fig. 9 is a kind of structure diagram of control device provided by the invention.In this embodiment, control dress
Putting 900 can include：Second processor 91, second memory 93 and second communication module 92, wherein,
Second communication module 92, for communicating with base station and dispatching desk.
Second memory 93, for storing program instruction.
Second processor 91 is arranged to caller instruction and performs step：
Receive base station transmission terminal send the second call request signaling, and according to the second call request signaling determine with
The corresponding sharing channel of second demand signalling.
Sharing channel is sent to base station, sharing channel is sent to by terminal by base station, it is common to occupy this with instruction terminal
Enjoy passage.
Device, please according to the first calling after the first call request signaling of terminal transmission is received in order to control for sharing channel
The sharing channel that signaling is asked to establish and is cached.
After sharing channel corresponding with the second call request signaling is determined, the second call request signaling is sent to scheduling
Platform is established by the second call request signaling and dispatching desk and called.
Further, second processor is arranged to the specific execution following steps of caller instruction：
Receive the successful response message of call setup that dispatching desk returns.
The successful response message of call setup is sent to base station, is sent out the successful response message of call setup by base station
Terminal is given, completes call setup.
Above example only technical concepts and features to illustrate the invention, its object is to allow person skilled in the art
Scholar can understand present disclosure and implement accordingly, can not limit the scope of the invention.It is all to be wanted with right of the present invention
The equivalent changes and modifications that scope is done are sought, the covering scope of the claims in the present invention should all be belonged to.
It should be appreciated that for those of ordinary skills, can be improved or converted according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (14)
1. a kind of Emmergency call method of trunked communication system, which is characterized in that this method comprises the following steps：
A, base station receives the second call request signaling that terminal is sent, and is connected according to the second call request signaling and the terminal
It connects, the second call request signaling carries type of call mark and terminal iidentification；
B, after control device is connected in the base station with the terminal, the terminal of the base station transmission is sent second is received
Call request signaling, and determine that share corresponding with the second call request signaling is led to according to second call request order
Road, and the sharing channel is sent to the terminal by the base station, to indicate that the terminal occupies the sharing channel；
The sharing channel is the control device after the first call request signaling that the terminal is sent is received, according to institute
State the sharing channel that the first call request signaling is established and cached；
C, the control device calls after sharing channel corresponding with the second call request signaling is determined by described second
Demand signalling is sent to dispatching desk, and the dispatching desk is established according to the second call request signaling and called.
2. the Emmergency call method of trunked communication system according to claim 1, which is characterized in that the step A includes：
A1, the base station receive the second call request signaling that the terminal is sent, and are taken according to the second call request signaling
The type of call mark of band judges whether the second call request signaling is emergency call, if so, exhaling according to terminal
Type is made to be connected with the terminal, and establishes the related information of the base station and the terminal；
A2, the base station are based on the terminal iidentification, and emergency call is sent to the control device；The urgent call letter
Order carries the terminal iidentification and related information.
3. the Emmergency call method of trunked communication system according to claim 2, which is characterized in that the step B includes：
B11, the control device receive the emergency call that the base station is sent, according to the terminal iidentification determine with it is described
The corresponding sharing channel of terminal iidentification；
B12, sharing channel corresponding with the terminal iidentification is distributed into the terminal.
4. the Emmergency call method of trunked communication system according to claim 2, which is characterized in that the control device bag
It includes：Mobility management entity module, clustered control function module and dispatch server；
The step B includes：
B21, the mobility management entity module receive the emergency call, according to the terminal iidentification determine with it is described
The corresponding control block of terminal iidentification；The control block is to be stored in the mobility management entity mould control block in the block；
B22, sharing channel corresponding with the terminal iidentification is determined by the control block, and the sharing channel is distributed to
The terminal；
B23, clustered control function module corresponding with the terminal iidentification is determined by the control block, and is promptly exhaled described
Signaling is made to be sent to the clustered control function module；
The emergency call is sent to the dispatch server by B24, the clustered control function module.
5. the Emmergency call method of trunked communication system according to claim 4, which is characterized in that the step C includes：
The emergency call is sent to dispatching desk by C11, the dispatch server；
C12, the dispatching desk receive and process the emergency call, and establish and call with the dispatch server.
6. the Emmergency call method of trunked communication system according to claim 1, which is characterized in that the method is also wrapped
It includes：
D, after dispatching desk establishes calling according to the second call request signaling, call setup success is returned to the control device
Response message；
E, the successful response message of the call setup is returned to the base station by the control device；
F, the base station receives and the successful response message of the call setup is returned to the terminal.
7. the Emmergency call method of trunked communication system according to claim 1, which is characterized in that the sharing channel bag
Multiple sharing channels are included, the service quality of each sharing channel is the superlative degree.
8. a kind of trunked communication system, which is characterized in that including terminal, base station, control device and dispatching desk, the terminal,
Base station, control device and dispatching desk are connected by network communication, are used to implement claim 1-7 any one of them clusters and are led to
The Emmergency call method of letter system.
9. a kind of Emmergency call method of trunked communication system, which is characterized in that the described method comprises the following steps：
Base station receives the second call request signaling that terminal is sent, and is connected according to the second call request signaling and the terminal
It connects, the second call request signaling carries type of call mark and terminal iidentification；
After the base station is connected with the terminal, the second call request signaling that the terminal is sent is sent to control device；
The base station receives the sharing channel corresponding with the second call request signaling that the control device is sent, and by institute
It states sharing channel and is sent to the terminal, to indicate that the terminal occupies the sharing channel, realize the terminal and the control
The call setup of device；
The sharing channel is the control device after the first call request signaling that the terminal is sent is received, according to institute
State the sharing channel that the first call request signaling is established and cached.
10. the Emmergency call method of trunked communication system according to claim 9, which is characterized in that the base station receives
The second call request signaling that terminal is sent, and the step of being connected according to the second call request signaling with the terminal wrap
It includes：
The base station receives the second call request signaling that the terminal is sent, and is carried according to the second call request signaling
Type of call mark judges whether the second call request signaling is emergency call, if so, the calling class according to terminal
Type is connected with the terminal, and establishes the related information of the base station and the terminal；
The base station is based on the terminal iidentification, and emergency call is sent to the control device；The emergency call
Carry the terminal iidentification and related information.
11. a kind of Emmergency call method of trunked communication system, which is characterized in that the described method comprises the following steps：
Control device receives the second call request signaling that the terminal of base station transmission is sent, and is believed according to second call request
Order determines sharing channel corresponding with second demand signalling；
The sharing channel is sent to the base station, the sharing channel is sent to by the terminal by the base station, with
Indicate that the terminal occupies the sharing channel；
The sharing channel is the control device after the first call request signaling that the terminal is sent is received, according to institute
State the sharing channel that the first call request signaling is established and cached；
The control device, please by the described second calling after sharing channel corresponding with the second call request signaling is determined
Signaling is asked to be sent to dispatching desk, is established and called by the second call request signaling and the dispatching desk.
12. the Emmergency call method of trunked communication system according to claim 11, which is characterized in that the method is also wrapped
It includes：
The control device receives the successful response message of call setup that the dispatching desk returns；
The successful response message of the call setup is sent to the base station by the control device, by the base station by described in
The successful response message of call setup is sent to the terminal, completes call setup.
13. a kind of base station, which is characterized in that including first processor, first memory and first communication module, wherein,
The first communication module, for communicating with control device and terminal；
The first memory, for storing program instruction；
The first processor is arranged to call described program instruction, performs the cluster as described in claim 9 and 10 and lead to
The Emmergency call method of letter system.
14. a kind of control device, which is characterized in that including second processor, second memory and second communication module, wherein,
The second communication module, for communicating with base station and dispatching desk；
The second memory, for storing program instruction；
The second processor is arranged to call described program instruction, performs the cluster as described in claim 11 and 12
The Emmergency call method of communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711299174.2A CN108076449B (en) | 2017-12-08 | 2017-12-08 | Emergency call method, trunking communication system, base station and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711299174.2A CN108076449B (en) | 2017-12-08 | 2017-12-08 | Emergency call method, trunking communication system, base station and control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108076449A true CN108076449A (en) | 2018-05-25 |
| CN108076449B CN108076449B (en) | 2021-01-19 |
Family
ID=62157859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711299174.2A Active CN108076449B (en) | 2017-12-08 | 2017-12-08 | Emergency call method, trunking communication system, base station and control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108076449B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111540180A (en) * | 2020-04-21 | 2020-08-14 | 北京长焜科技有限公司 | B-Trunc emergency alarm system and method thereof |
| CN112995970A (en) * | 2019-12-18 | 2021-06-18 | 北京新岸线移动多媒体技术有限公司 | Method and device for emergency communication in wireless communication system |
| WO2021142834A1 (en) * | 2020-01-19 | 2021-07-22 | 深圳市鑫王牌科技发展有限公司 | Emergency call method, terminal device, and server |
| CN113810476A (en) * | 2021-08-30 | 2021-12-17 | 武汉海昌信息技术有限公司 | Signaling safety transmission method and device for industrial internet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1541002A (en) * | 2003-04-22 | 2004-10-27 | ��ʽ����Ntt����Ħ | Calling acception controller and calling acception control method |
| CN101262535A (en) * | 2008-04-11 | 2008-09-10 | 华为技术有限公司 | Call billing method, system, device and equipment |
| CN101841791A (en) * | 2009-03-18 | 2010-09-22 | 华为技术有限公司 | Method, evolution base station and system for emergency call service |
| US20150003355A1 (en) * | 2012-01-31 | 2015-01-01 | Nokia Corporation | Method and apparatus for preserving physical uplink control channel resources |
| WO2015143913A1 (en) * | 2014-03-26 | 2015-10-01 | 海能达通信股份有限公司 | Method and device for communication based on trunking system |
-
2017
- 2017-12-08 CN CN201711299174.2A patent/CN108076449B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1541002A (en) * | 2003-04-22 | 2004-10-27 | ��ʽ����Ntt����Ħ | Calling acception controller and calling acception control method |
| CN101262535A (en) * | 2008-04-11 | 2008-09-10 | 华为技术有限公司 | Call billing method, system, device and equipment |
| CN101841791A (en) * | 2009-03-18 | 2010-09-22 | 华为技术有限公司 | Method, evolution base station and system for emergency call service |
| US20150003355A1 (en) * | 2012-01-31 | 2015-01-01 | Nokia Corporation | Method and apparatus for preserving physical uplink control channel resources |
| WO2015143913A1 (en) * | 2014-03-26 | 2015-10-01 | 海能达通信股份有限公司 | Method and device for communication based on trunking system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112995970A (en) * | 2019-12-18 | 2021-06-18 | 北京新岸线移动多媒体技术有限公司 | Method and device for emergency communication in wireless communication system |
| WO2021142834A1 (en) * | 2020-01-19 | 2021-07-22 | 深圳市鑫王牌科技发展有限公司 | Emergency call method, terminal device, and server |
| CN111540180A (en) * | 2020-04-21 | 2020-08-14 | 北京长焜科技有限公司 | B-Trunc emergency alarm system and method thereof |
| CN113810476A (en) * | 2021-08-30 | 2021-12-17 | 武汉海昌信息技术有限公司 | Signaling safety transmission method and device for industrial internet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108076449B (en) | 2021-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110167051B (en) | Communication method and communication equipment under centralized unit-distributed unit architecture | |
| US10455489B2 (en) | Method for supporting PDN GW selection | |
| AU679438B2 (en) | A person paging method | |
| CN108076449A (en) | Emmergency call method, trunked communication system, base station and control device | |
| KR20190133031A (en) | Communication method and device | |
| CN104683956B (en) | QoS control method and system | |
| CN108617020A (en) | A kind of method and system for establishing control plane connection | |
| US20190075606A1 (en) | Coordinated selection of user plane functions in core and radio access networks | |
| WO2014106394A1 (en) | Method, system, base station and cluster epc for establishing group call context | |
| CN103581839B (en) | Broadband trunking service realizing method and broadband trunking service realizing system | |
| CN110475381A (en) | Communication means, equipment and system | |
| CN114828165A (en) | Communication method and communication device | |
| WO2020192438A1 (en) | Communication method, apparatus, and system | |
| CN109089333B (en) | Digital cluster system group dispatching implementation method | |
| CN103052034B (en) | A kind of Long Term Evolution realizes the method for cluster multi call session, system and equipment | |
| CN116684831A (en) | Data transmission method, device and system | |
| CN103458373B (en) | A kind of clustering service implementation methods and its device | |
| CN109327810B (en) | Subway PIS service multicast method and device based on LTE broadband trunking communication | |
| CN108012342A (en) | Multicast service handling method and device in a kind of LTE-M networks | |
| JP3847755B2 (en) | Method for routing a message between a mobile control function entity and a cell control function entity in a distributed radio access network | |
| CN110035474A (en) | Connection control method, user equipment, base station and the device with store function | |
| CN102656921A (en) | Method and device for service switch | |
| CN107770175B (en) | Soft switch calling method and system | |
| CN107872733A (en) | The video call method and device and server of voice and video shunting transmission | |
| CN104113370B (en) | Satellite communication call forwarding system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |