CN106658423B - Group call service processing method and system for broadband trunking communication system - Google Patents

Group call service processing method and system for broadband trunking communication system Download PDF

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Publication number
CN106658423B
CN106658423B CN201510727602.1A CN201510727602A CN106658423B CN 106658423 B CN106658423 B CN 106658423B CN 201510727602 A CN201510727602 A CN 201510727602A CN 106658423 B CN106658423 B CN 106658423B
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group call
group
scc
mme
response message
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CN106658423A (en
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张再超
胡培成
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Putian Information Technology Co Ltd
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Putian Information Technology Co Ltd
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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
    • 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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Abstract

The invention provides a group call service processing method of broadband trunking communication systems, which comprises the steps that after a group call is established, a gateway sends th group call data loss information comprising a group number and an identification of the group call to a Mobility Management Entity (MME) when a group call downlink data packet of the group call is not received, if response information fed back by the MME is not received, group call resources of the group call of the gateway are released, if response information fed back by the MME is received, whether the group call resources of the group call are released or not is determined according to the received response information of the MME.

Description

Group call service processing method and system for broadband trunking communication system
Technical Field
The invention relates to a group call service processing method and a group call service processing system of broadband trunking communication systems.
Background
The trunking communication system is a special wireless communication system developed for meeting the demand of commanding and dispatching of industry users and oriented to specific industry application, a large number of wireless users in the system share a small number of wireless channels and use commanding and dispatching as main application, and is multipurpose and high-efficiency wireless communication systems, and the trunking communication system has -wide application market in the fields of government , public safety, emergency communication, electric power, civil aviation, petrochemical industry, military and the like.
In the 21 st century, the economy and the science and technology are developed at a high speed, the mobile internet is changed from the world, and the application of the cluster system is changed, complicated and diversified, so that more demands are put on the cluster system, and the cluster system is embodied in the aspects of high-speed data, videos and various applications constructed on the basis, including mobile office, multimedia cluster scheduling, video monitoring, urban emergency linkage and the like. Meanwhile, the trunking communication system should have larger channel capacity, higher spectrum utilization rate, better transmission performance, adopt a low-cost, scalable, configurable all-IP wireless multimedia network architecture, and be able to implement smooth evolution. Therefore, a wideband digital trunking system based on the TD-LTE technology has been developed.
In the broadband wireless access subsystem, xGW (integrated service gateway) is important logical network elements and is responsible for completing bearer management according to the indication of an MME (Mobility management entity), and after the service is successfully established, is responsible for completing routing and data forwarding, Qos management, charging and monitoring functions.
The group call is the most important services in the trunking system, and in the group call holding process, the following problems may occur because there is a problem in the path between xGW-SCC network elements, and MME or xGW such as group call release related message is not received, and so on:
1. group call uplink data SCC (switching control center) is received and forwarded, but xGW does not receive group call downlink data (group call context exists in SCC and xGW), and it is possible that the path between xGW and SCC is broken (Ta interface user plane is not on)
2. The Ta interface control plane message is transmitted by udp, and the group call release message from the SCC to the MME may be lost, which results in the suspension of the group call related resources in the MMEs and xGW (the resource suspension may also exist in the eNB), and further shows that xGW has no group call downlink data (because the SCC has no group call context).
3. The method includes that udp transmission is adopted between MME and xGW, when a group call is finished in times, MME sends a group call resource release request to all network elements in the network, but a group call release message sent by MME to xGW may be lost, at the moment, MME releases the group call resource, at the moment, -like eNB, UE (User Equipment) and SCC where the group call is located also release the group call resource, only xGW does not release the group call resource, the group call related resource in xGW is hung up, and further xGW-free group call downlink data (no context exists due to SCC group call) is shown.
Based on the above problems, the existing system has the following disadvantages:
a. in the process of maintaining the group call service, under some abnormal conditions, EPC (core network) can not receive the group call downlink data for a long time, and no network element in the current system can sense and process the abnormality;
b. the MME, xG W and eNodeb (Evolved Node B, base station) network elements can have long-time resource hang-up, which not only wastes resources, but also influences the number of accessible services and influences the performance and stability of the system;
c. air interface bandwidth resources may be idle for a long time;
all the above disadvantages can cause abnormal service, and the called party can not normally hear the data sent by the speaking right user all the time, so that the user experience is poor.
Disclosure of Invention
The invention provides group call service processing methods and systems of broadband cluster communication system, the method monitors whether the gateway has group call downlink data after the group call is established, and triggers the resource release mechanism when there is no group call downlink data, thus effectively saving bandwidth resources and internal resources of logic network elements.
, the invention provides a method for processing group call service in broadband trunking communication system, comprising:
after a group call is established, when a group call downlink data packet of the group call is not received, a gateway sends th group call data loss information including a group number and an identification of the group call to a mobility management entity MME, so that the MME queries an exchange control center SCC according to the group number and the identification of the group call, and a response message is fed back when a group call context of the group call does not exist in the SCC or the group call context of the group call exists in the SCC and the speaking right of the group call is distributed;
if the response information fed back by the MME is not received, releasing the group calling resource of the group calling of the gateway;
and if response information fed back by the MME is received, determining whether to release the group calling resource of the group calling according to the received response information of the MME.
Preferably, determining whether to release the group call resource of the group call subsequently according to the received response message of the MME includes:
judging whether the received response message of the MME is an th response message, wherein the th response message is a response message fed back by the MME when the group call context of the group call does not exist in the SCC;
and if the received response message is the th response message, waiting for a group call resource release request initiated by the MME so as to release the group call resource of the group call according to the group call resource release request initiated by the MME.
Further , determining whether the received response message of the MME is after the response message, the method further comprises:
if the received response message is not the th response message, determining whether the received response message of the MME is a second response message, wherein the second response message is a response message fed back by the MME when the SCC has a group call context of the group call and the speaking right of the group call is allocated;
and if the received response message is the second response message, waiting for a group call resource release request initiated by the SCC and forwarded by the MME, so as to release the group call resource of the group call according to the group call resource release request initiated by the SCC and forwarded by the MME.
In addition, , the present invention further provides a group call service processing method of broadband trunking communication systems, including:
a mobility management entity MME receives group call data loss information which is sent by a gateway and comprises a group number and an identification of a group call;
judging whether the group calling context of the group calling exists in the MME or not according to the group number and the identification;
if the group call context of the group call exists, sending second group call data loss information comprising the group number and the identification to the SCC, so that the SCC queries the SCC according to the group number and the identification of the group call, and feeding back a response message when the group call context of the group call exists in the SCC and the speaking right of the group call is allocated;
if the response message fed back by the SCC is not received, initiating a group call resource release request to the MME, the gateway, the eNB where the group call is located and the UE where the group call is located, so that the MME, the gateway, the eNB and the UE release the group call resource of the group call;
and if the response message fed back by the SCC is received, determining whether the group call resource of the group call is released or not according to the received response message fed back by the SCC.
Preferably, determining whether to release the group call resource of the group call according to the received response message fed back by the SCC includes:
judging whether a received response message of the SCC is a third response message, wherein the third response message is a response message fed back by the MME when a group call context of the group call exists in the SCC and the speaking right of the group call is distributed;
if the received response message is the third response message, sending a second response message to the gateway, waiting for a group call resource release request initiated by the SCC, releasing the group call resource of the group call according to the group call resource release request initiated by the SCC, and after receiving the group call resource release request initiated by the SCC, forwarding the group call resource release request initiated by the SCC to the gateway, the eNB where the group call is located and the UE where the group call is located, so that the gateway, the eNB and the UE release the group call resource of the group call.
In a third aspect, the present invention further provides a group call service processing method in broadband trunking communication systems, including:
the method comprises the steps that an exchange control center SCC receives second group call data loss information which is sent by a mobility management entity MME and comprises a group number and an identification of a group call;
judging whether a group calling context of the group calling exists in the SCC according to the group number and the identification of the group calling;
if yes, judging whether the speaking right of the group calling is distributed;
if the group call resource is allocated, sending a third response message to an MME, initiating a group call resource release request to the SCC and the MME so that the SCC and the MME release the group call resource of the group call, and after receiving the group call resource release request initiated by the SCC, the MME forwards the group call resource release request initiated by the SCC to a gateway, an eNB where the group call is located and UE where the group call is located so that the gateway, the eNB and the UE release the group call resource of the group call.
In a fourth aspect, the present invention further provides a group call service processing system of broadband trunking communication systems, including:
an information sending unit, which is configured to send, by a gateway, group call data loss information including a group number and an identifier of a group call to a mobility management entity MME after the group call is established and when a group call downlink data packet of the group call is not received, so that the MME queries an exchange control center SCC according to the group number and the identifier of the group call, and feeds back a response message when the group call context of the group call does not exist in the SCC or the group call context of the group call exists in the SCC and a speaking right of the group call is allocated;
resource releasing unit, if not receiving the response information fed back by MME, releasing the group calling resource of the group calling of the gateway;
and an determining unit, configured to determine whether to release the group call resource of the group call according to the received response message of the MME if the response message fed back by the MME is received.
Preferably, the th determination unit includes:
an th determining subunit, configured to determine whether a received response message of the MME is a th response message, where the th response message is a response message fed back by the MME when no group call context of the group call exists in the SCC;
, a waiting subunit, if the received response message is the response message, then waiting for the group call resource release request initiated by the MME, so as to release the group call resource of the group call according to the group call resource release request initiated by the MME.
In a fifth aspect, the present invention further provides a group call service processing system of broadband trunking communication systems, including:
information receiving unit, mobility management entity MME receives the group call data loss information including group number and identification of group call sent by gateway;
an th judgment unit, for judging whether there is the group calling context of the group calling in the MME according to the group number and the identification;
a second information sending unit, configured to send a second group call data loss information including the group number and the identifier to the SCC if the group call context of the group call exists, so that the SCC queries the SCC according to the group number and the identifier of the group call, and feeds back a response message when the group call context of the group call exists in the SCC and the speaking right of the group call is already allocated;
, a release request unit, which initiates a group call resource release request to the MME, the gateway, the eNB where the group call is located, and the UE where the group call is located if no response message fed back by the SCC is received, so that the MME, the gateway, the eNB, and the UE release the group call resource of the group call;
and a second determining unit, configured to determine whether to release the group call resource of the group call according to the received response message fed back by the SCC, if the response message fed back by the SCC is received.
In a sixth aspect, the present invention further provides a group call service processing system of broadband trunking communication systems, including:
a second information receiving unit, wherein the switching control center SCC receives second group call data loss information including a group number and an identifier of a group call, which is sent by the mobility management entity MME;
a second judging unit, for judging whether the group call context of the group call exists in the SCC according to the group number and the identification of the group call;
a third judging unit, if the third judging unit exists, judging whether the speaking right of the group calling is distributed;
and a second release request unit, configured to send a third response message to an MME if the group call resource is allocated, initiate a group call resource release request to the SCC and the MME, so that the SCC and the MME release the group call resource of the group call, and forward the group call resource release request initiated by the SCC to the gateway, the eNB where the group call is located, and the UE where the group call is located after receiving the group call resource release request initiated by the SCC, so that the gateway, the eNB, and the UE release the group call resource of the group call.
According to the technical scheme, after the group call is established, whether the gateway has the group call downlink data is monitored, signaling interaction is carried out between the gateway and the MME and the SCC when the group call downlink data does not exist, whether the group call is normal or not is judged, and a resource release mechanism is triggered when the group call is abnormal, so that bandwidth resources and internal resources of a logic network element are effectively saved.
Drawings
Fig. 1 is a flowchart of a group call service processing method of broadband trunking communication systems according to an embodiment of of the present invention;
FIG. 2 is a flow chart of embodiments of step S103 in the embodiment shown in FIG. 1;
fig. 3 is a flowchart of a group call service processing method of broadband trunking communication systems according to another embodiment of the present invention;
FIG. 4 is a flowchart of embodiments of step S305 in the embodiment shown in FIG. 3;
fig. 5 is a flowchart of a group call service processing method of broadband trunking communication systems according to a third embodiment of the present invention;
fig. 6 is a signaling diagram of a group call service processing method of broadband trunking communication systems according to a third embodiment of the present invention;
fig. 7 is a schematic block diagram of a group call service processing system of broadband trunking communication systems according to an embodiment of of the present invention;
fig. 8 is a schematic block diagram of a group call service processing system of broadband trunking communication systems according to another embodiment of the present invention;
fig. 9 is a schematic block diagram of a group call service processing system of broadband trunking communication systems according to a third embodiment of the present invention.
Description of the reference numerals
th information transmitting unit 701 the th resource releasing unit 702
th determining unit 703 th th information receiving unit 801
th judging unit 802 second information transmitting unit 803
Release request Unit 804 second determination Unit 805
Second information receiving unit 901 second judging unit 902
Third judging unit 903 second release requesting unit 904
Detailed Description
The following detailed description describes specific embodiments of the present invention in conjunction with the accompanying drawings and examples, which are intended to illustrate the invention but not to limit the scope of the invention.
Fig. 1 is a flowchart illustrating a group call service processing method of broadband trunking communication systems according to an embodiment of of the present invention.
As shown in fig. 1, the group call service processing method of broadband trunking communication systems includes:
s101, after a group call is established, when a group call downlink data packet of the group call is not received, a gateway sends th group call data loss information including a group number and an identification of the group call to a Mobility Management Entity (MME) so that the MME queries an exchange control center (SCC) according to the group number and the identification of the group call, and when the SCC does not have the group call context of the group call, or the SCC has the group call context of the group call and the speaking right of the group call is distributed, a response message is fed back;
s102, if the response information fed back by the MME is not received, releasing the group calling resource of the group calling of the gateway;
the response message fed back by the MME is not received, it indicates that the group call context of the group call does not exist in the MME, it indicates that the group call resource of the group call in the MME has been released, the group call resource of the group call of other network elements has also been released, and the abnormal resource hangs up in the gateway, which causes the situation, there are many reasons, for example, the failure of the group call resource release request message initiated by the MME, the loss of the group call resource release request message initiated by the MME, or the abnormality in the MME, etc., so the MME does not process the th data loss information and directly discards it, so the gateway cannot receive the response message fed back by the MME, and at this time, the gateway must release the group call resource in the gateway, thereby preventing the resource hang up in the gateway.
S103, if response information fed back by the MME is received, determining whether to release the group calling resource of the group calling according to the received response information of the MME.
And if the response message fed back by the MME is received, the group calling still exists in the MME, namely the group calling resource of the group calling is not released.
After the group call is established, the invention monitors whether the gateway has the group call downlink data, and carries out signaling interaction with MME and SCC when the group call downlink data does not exist, judges whether the group call is normal, and triggers a resource release mechanism when the group call is abnormal, thereby effectively saving bandwidth resources and internal resources of logic network elements.
Fig. 2 is a flowchart of embodiments of step S103.
As shown in fig. 2, step S103 includes:
s201, judging whether the received response message of the MME is a th response message, wherein the th response message is a response message fed back by the MME when the group call context of the group call does not exist in the SCC;
and S2011, waiting for a group call resource release request initiated by the MME, and releasing the group call resource of the group call according to the group call resource release request initiated by the MME.
If receiving the th response message of the MME, the SCC initiates a group call resource release request, and releases the group call resources of the group call in the SCC, but the MME does not receive the group call resource release request message initiated by the SCC, so the SCC will automatically release the group call resources of the group call in the SCC if waiting for the release response is overtime, and the MME and the gateway still have the group call resources of the group call.
S2012, determining whether the received response message of the MME is a second response message, where the second response message is a response message fed back by the MME when the group call context of the group call exists in the SCC and the speaking right of the group call is allocated, if the received response message is the second response message, executing step S20121, and if the received response message is not the second response message, executing step S20122;
s20121, waiting for a group call resource release request initiated by an SCC and forwarded by an MME, and releasing the group call resource of the group call according to the group call resource release request initiated by the SCC and forwarded by the MME;
if the second response message fed back by the MME is received, it indicates that the group call downlink packet sent by the SCC cannot normally reach the gateway, and it indicates that there is a problem in the path between the SCC and the gateway, and there are many reasons for causing the problem in the path between the SCC and the gateway, for example: the method comprises the steps that a target IP cannot be reached, a network cable is loosened, networking is wrong and the like, but the SCC and the MME have normal paths, so that a group call downlink data packet of the SCC cannot reach a gateway, and the SCC, the MME and the gateway all have group call resources of the group call, at the moment, the SCC triggers a resource release mechanism, a group call resource release request is initiated to the SCC and the MME, the MME forwards the group call resource release request initiated by the SCC to the gateway, an eNB where the group call is located and UE where the group call is located, so that the gateway, the eNB and the UE release the group call resources of the group call, the SCC, the MME, the gateway, the eNB and the UE release the group call resources of the group call, and further prevent the resources in the MME.
S20122, determining that the group calling state is normal. At this time, all network elements do not need to release the group call resource.
At this time, it indicates that the response message received by the gateway is a third response message, where the third response message is a response message fed back by the MME when the speaking right of the group call is not allocated, but the group call context of the group call exists in the SCC.
The group calling service includes a video group calling service and a voice group calling service, and the UE with speaking right always transmits data on a dedicated bearer during the group calling process (even if the UE does not send any uplink data, there is an uplink silent tone). If the received response message is not the second response message but the third response message, it indicates that the speaking right of the group call is not allocated, and there may be no group call data.
Fig. 3 is a flowchart of a group call service processing method of broadband trunking communication systems according to another embodiment of the present invention.
As shown in fig. 3, the group call service processing method of broadband trunking communication systems includes:
s301, a mobility management entity MME receives th group call data loss information which is sent by a gateway and comprises a group number and an identification of a group call;
s302, judging whether a group calling context of the group calling exists in the MME or not according to the group number and the identification; if the group calling context of the group calling exists, executing step S303, if the group calling context of the group calling does not exist, executing step S306;
s303, sending second group call data loss information including the group number and the identification to the SCC, so that the SCC queries the SCC according to the group number and the identification of the group call, and feeding back a response message when a group call context of the group call exists in the SCC and the speaking right of the group call is allocated;
s304, if the response message fed back by the SCC is not received, initiating a group call resource release request to the MME, the gateway, the eNB where the group call is located and the UE where the group call is located, so that the MME, the gateway, the eNB and the UE release the group call resources of the group call;
this case is already described in the above step S2011 and will not be described in detail.
S305, if a response message fed back by the SCC is received, determining whether to release the group call resource of the group call according to the received response message fed back by the SCC.
This case is already described in step S2012 and step S20121 described above, and is not described in detail.
S306, the data loss information of the th group is not processed and is directly discarded.
This case is already described in the above step S102 and will not be described in detail.
After the group call is established, whether the gateway has the group call downlink data is monitored, the MME performs signaling interaction with the gateway and the SCC when the group call downlink data does not exist, judges whether the group call is normal or not, and triggers a resource release mechanism when the group call is abnormal, so that bandwidth resources and internal resources of logic network elements are effectively saved.
Fig. 4 is a flowchart of embodiments of the step S305.
As shown in fig. 4, step S305 includes:
s401, judging whether a received response message of the SCC is a third response message, wherein the third response message is a response message fed back by the MME when a group call context of the group call exists in the SCC and the speaking right of the group call is distributed; if the received response message is the third response message, executing step S4011, and if the received response message is not the third response message, executing step S4012;
s4011, sending a second response message to a gateway, and waiting for a group call resource release request initiated by an SCC, so as to release group call resources of the group call according to the group call resource release request initiated by the SCC, and after receiving the group call resource release request initiated by the SCC, forwarding the group call resource release request initiated by the SCC to the gateway, an eNB where the group call is located, and a UE where the group call is located, so that the gateway, the eNB, and the UE release the group call resources of the group call;
this is described above and will not be described in detail.
S4012, receiving a fourth response message fed back by the SCC, and feeding back a third response message to the gateway, where the fourth response message is a response message fed back by the SCC when the group call context of the group call exists in the SCC but the speaking right of the group call is not allocated.
If the received response message is not the fourth response message, it indicates that the group call context of the group call exists in the SCC, but the speaking right of the group call is not allocated, and at this time, it is known from the foregoing description that no downlink data is normal. At this time, all network elements do not need to release the group call resource.
Fig. 5 is a flowchart of a group call service processing method of broadband trunking communication systems according to a third embodiment of the present invention.
As shown in fig. 5, the group call service processing method of broadband trunking communication systems includes:
s501, an exchange control center SCC receives second group call data loss information which is sent by a mobility management entity MME and comprises a group number and an identification of a group call;
s502, judging whether a group calling context of the group calling exists in SCC according to the group number and the identification of the group calling; if so, executing step S5021, otherwise, executing step S5022;
s5021, judging whether the speaking right of the group calling is distributed; if so, go to step S50211, and if not, go to step S50212;
s50211, sending a third response message to an MME, initiating a group call resource release request to the SCC and the MME so that the SCC and the MME release the group call resources of the group call, and after receiving the group call resource release request initiated by the SCC, the MME forwards the group call resource release request initiated by the SCC to a gateway, an eNB where the group call is located and UE where the group call is located so that the gateway, the eNB and the UE release the group call resources of the group call.
This is described in detail above and will not be described in detail.
S50212, determining that the group calling state of the group calling is normal, and feeding back a fourth response message to the MME.
If the SCC has the group call context of the group call but the speaking right of the group call is not allocated, it can be known from the above description that no downlink data is normal. At this time, all network elements do not need to release the group call resource.
And S5022, the second group of call data loss information is not processed and is directly discarded.
This is described above and will not be described in detail.
After the group call is established, the invention monitors whether the gateway has the group call downlink data, and the SCC, the MME and the gateway carry out signaling interaction when the group call downlink data does not exist, judges whether the group call is normal or not, and triggers a resource release mechanism when the group call is abnormal, thereby effectively saving bandwidth resources and internal resources of logic network elements.
Fig. 6 shows a signaling diagram of a group call service processing method of broadband trunking communication systems according to an embodiment of of the present invention.
Fig. 6 illustrates the case where UE1-UEx, eNB1-eNBx, and xGW are used as gateway, MME, and SCC network elements, and the th information timer, th response timer, and second response timer are set to prevent the waste of bandwidth resources, for details please refer to the following method.
As shown in fig. 6, the group call service processing method of broadband trunking communication systems includes:
s601, xGW starts the message timer after the group call is established, if the message timer is overtime and does not receive the group call downlink data packet of the group call, then execute step S602;
s602 and xGW sending data loss information of group call including group number and identification of the group call to MME, so that the MME queries an exchange control center SCC according to the group number and identification of the group call, and feeds back response message when the SCC does not have group call context of the group call, or when the SCC has group call context of the group call and the speaking right of the group call is distributed;
s603, xGW starts a th response timer;
after receiving the group calling data loss information which is sent by xGW and comprises the group number and the identification of the group calling, the MME judges whether the group calling context of the group calling exists in the MME or not according to the group number and the identification;
if the MME determines that the group call context of the group call exists, then execute S604, if the group call context of the group call does not exist, then execute step S617;
s604, the MME sends second group call data loss information including the group number and the identification to the SCC, so that the SCC queries the SCC according to the group number and the identification of the group call, and feeds back a response message when the group call context of the group call exists in the SCC and the speaking right of the group call is distributed;
s605, the MME starts a second response timer;
after receiving second group call data loss information which is sent by MME and comprises a group number and an identification of a group call, the SCC judges whether a group call context of the group call exists in the SCC according to the group number and the identification of the group call; if the SCC has the group call context of the group call, the SCC judges whether the speaking right of the group call is already allocated, if the SCC 606 determines that the speaking right of the group call is already allocated, the step S607 is executed, and if the SCC 613 determines that the speaking right of the group call is not allocated, the step S614 is executed; if the SCC does not have the group call context of the group call, perform step S620;
s607, SCC sends a third response message to MME;
and simultaneously, executing S608, SCC to initiate a group call resource release request to the SCC and the MME, so that the MME releases the group call resource of the group call, and after receiving the group call resource release request initiated by the SCC, the MME forwards the group call resource release request initiated by the SCC to xGW, the eNB where the group call is located and the UE where the group call is located, so that the xGW, the eNB and the UE release the group call resource of the group call.
S609, after the MME receives the third response message of the SCC, the second response timer is closed, and step S609a is executed;
s609a, the MME feeds back a second response message to xGW; simultaneously executing step S610;
s610, the MME waits for a group call resource release request initiated by the SCC to release the group call resource of the group call according to the group call resource release request initiated by the SCC; executing step S615;
s611, after receiving the group call resource release request initiated by the SCC, the MME forwards the group call resource release request initiated by the SCC to xGW, the eNB where the group call is located, and the UE where the group call is located, so that the xGW, the eNB, and the UE release the group call resource of the group call;
and S612 and xGW close the response timer after receiving the second response message sent by the MME, wait for the group call resource release request initiated by the SCC and forwarded by the MME, and release the group call resource of the group call according to the group call resource release request initiated by the SCC and forwarded by the MME.
S614, the SCC feeds back a fourth response message to the MME;
s615, after the MME receives the fourth response message, closing a second response timer; and performs step S615 a;
s615a, the MME feeds back a fifth response message to xGW;
s616, xGW, upon receiving the fifth response message, closes the th response timer.
S620, the SCC does not process the second group call data loss information and directly discards the second group call data loss information;
at this time, the MME does not receive the response message of the SCC, and performs step S621;
s621, the second response timer is overtime; then, step S622 is executed; simultaneously executing step S624;
s622, the MME feeds back a response message to xGW, and executes step S623 and step S624;
s623, turn off response timer.
S624, MME sends group calling resource releasing request to MME, gateway, eNB where group calling locates and UE where group calling locates, so as to make MME, gateway, eNB and UE release group calling resource of group calling;
if the MME determines that there is no group call context for the group call, then step S617 is executed;
s617, the MME does not process the th group data loss information and directly discards the data loss information;
at this time, xGW does not receive the response message of MME, execute step S618;
s618, response timer is over;
then, step S619 is executed;
s619, xGW release xGW the group call resources for the group call.
The timer timeout described above is obtained by setting preset time periods in the timer in advance.
The th message timer is periodic and will restart automatically after time-out as long as group calling exists, while the th response timer and the second response timer are single and start only after sending data loss message and will not restart automatically after time-out.
When the gateway cannot receive the downlink data packet of the group call, the signaling interaction with the MME is realized by triggering the mechanism of sending the data loss information to the MME, and the signaling interaction between the MME and the SCC is realized, so that the gateway, the MME or the SCC can sense the abnormity, and a resource release mechanism is triggered when the abnormity is sensed, thereby effectively saving bandwidth resources and internal resources of logic network elements.
Fig. 7 is a schematic block diagram of a group call service processing system of broadband trunking communication systems according to an embodiment of of the present invention.
As shown in fig. 7, the group call service processing system of broadband trunking communication systems includes:
an information sending unit 701, configured to send, by a gateway, group call data loss information including a group number and an identifier of a group call to a mobility management entity MME after the group call is established and when a group call downlink data packet of the group call is not received, so that the MME queries an exchange control center SCC according to the group number and the identifier of the group call, and feeds back a response message when the group call context of the group call does not exist in the SCC or when the group call context of the group call exists in the SCC and a speaking right of the group call is allocated;
, a resource releasing unit 702, if not receiving the response information fed back by the MME, releasing the group call resource of the group call of the gateway;
a th determining unit 703, if receiving the response information fed back by the MME, determining whether to release the group call resource of the group call according to the received response information of the MME.
Preferably, the th determining unit 703 includes:
an th determining subunit, configured to determine whether a received response message of the MME is a th response message, where the th response message is a response message fed back by the MME when no group call context of the group call exists in the SCC;
, a waiting subunit, if the received response message is the response message, then waiting for the group call resource release request initiated by the MME, so as to release the group call resource of the group call according to the group call resource release request initiated by the MME.
Fig. 8 is a schematic block diagram of a group call service processing system of broadband trunking communication systems according to another embodiment of the present invention.
As shown in fig. 8, the group call service processing system of broadband trunking communication systems includes:
information receiving unit 801, mobility management entity MME receives group call data loss information including group number and identification of group call sent by gateway;
, determining unit 802, determining whether there is a group call context of the group call in MME according to the group number and the identifier;
a second information sending unit 803, configured to send, if a group call context of the group call exists, second group call data loss information including the group number and the identifier to the SCC, so that the SCC queries the SCC according to the group number and the identifier of the group call, and feeds back a response message when the group call context of the group call exists in the SCC and the speaking right of the group call is already allocated;
release request unit 804, if not receiving the response message fed back by SCC, initiating a group call resource release request to the MME, the gateway, the eNB where the group call is located, and the UE where the group call is located, so that the MME, the gateway, the eNB, and the UE release the group call resource of the group call;
a second determining unit 805, if receiving the response message fed back by the SCC, determines whether to release the group call resource of the group call according to the received response message fed back by the SCC.
Fig. 9 is a schematic block diagram of a group call service processing system of broadband trunking communication systems according to a third embodiment of the present invention.
As shown in fig. 9, the group call service processing system of broadband trunking communication systems includes:
a second information receiving unit 901, where the switching control center SCC receives second group call data loss information including a group number and an identifier of a group call, which is sent by the mobility management entity MME;
a second judging unit 902, which judges whether a group call context of the group call exists in the SCC according to the group number and the identifier of the group call;
a third judging unit 903, which judges whether the speaking right of the group call is already allocated if the speaking right of the group call exists;
a second release requesting unit 904, if allocated, sends a third response message to an MME, and initiates a group call resource release request to the SCC and the MME, so that the SCC and the MME release the group call resource of the group call, and after receiving the group call resource release request initiated by the SCC, the MME forwards the group call resource release request initiated by the SCC to the gateway, the eNB where the group call is located, and the UE where the group call is located, so that the gateway, the eNB, and the UE release the group call resource of the group call.
The system and method of the present invention correspond to and will not be described in detail herein.
Those of ordinary skill in the art will understand that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and scope of the present invention as defined in the appended claims.

Claims (6)

1, group calling service processing method of broadband cluster communication system, characterized by that, including:
after a group call is established, when a group call downlink data packet of the group call is not received, a gateway sends th group call data loss information including a group number and an identification of the group call to a mobility management entity MME, so that the MME queries an exchange control center SCC according to the group number and the identification of the group call, and a response message is fed back when a group call context of the group call does not exist in the SCC or the group call context of the group call exists in the SCC and the speaking right of the group call is distributed;
if the response information fed back by the MME is not received, releasing the group calling resource of the group calling of the gateway;
if response information fed back by the MME is received, determining whether to release the group calling resource of the group calling according to the received response information of the MME; the method specifically comprises the following steps:
judging whether the received response message of the MME is an th response message, wherein the th response message is a response message fed back by the MME when the group call context of the group call does not exist in the SCC;
if the received response message is the th response message, waiting for a group call resource release request initiated by the MME so as to release the group call resource of the group call according to the group call resource release request initiated by the MME;
if the received response message is not the th response message, determining whether the received response message of the MME is a second response message, wherein the second response message is a response message fed back by the MME when the SCC has a group call context of the group call and the speaking right of the group call is allocated;
and if the received response message is the second response message, waiting for a group call resource release request initiated by the SCC and forwarded by the MME, so as to release the group call resource of the group call according to the group call resource release request initiated by the SCC and forwarded by the MME.
2, group calling service processing method of broadband cluster communication system, characterized by that, including:
a mobility management entity MME receives group call data loss information which is sent by a gateway and comprises a group number and an identification of a group call;
judging whether the group calling context of the group calling exists in the MME or not according to the group number and the identification;
if the group call context of the group call exists, sending second group call data loss information comprising the group number and the identification to the SCC, so that the SCC queries the SCC according to the group number and the identification of the group call, and feeding back a response message when the group call context of the group call exists in the SCC and the speaking right of the group call is allocated;
if the response message fed back by the SCC is not received, initiating a group call resource release request to the MME, the gateway, the eNB where the group call is located and the UE where the group call is located, so that the MME, the gateway, the eNB and the UE release the group call resource of the group call;
if receiving a response message fed back by the SCC, determining whether to release the group call resource of the group call according to the received response message fed back by the SCC; the method specifically comprises the following steps:
judging whether a received response message of the SCC is a third response message, wherein the third response message is a response message fed back by the MME when a group call context of the group call exists in the SCC and the speaking right of the group call is distributed;
if the received response message is the third response message, sending a second response message to the gateway, waiting for a group call resource release request initiated by the SCC, releasing the group call resource of the group call according to the group call resource release request initiated by the SCC, and after receiving the group call resource release request initiated by the SCC, forwarding the group call resource release request initiated by the SCC to the gateway, the eNB where the group call is located and the UE where the group call is located, so that the gateway, the eNB and the UE release the group call resource of the group call.
3, group calling service processing method of broadband cluster communication system, which is characterized in that it includes:
the method comprises the steps that an exchange control center SCC receives second group call data loss information which is sent by a mobility management entity MME and comprises a group number and an identification of a group call;
judging whether a group calling context of the group calling exists in the SCC according to the group number and the identification of the group calling;
if yes, judging whether the speaking right of the group calling is distributed;
if the group calling resource is allocated, sending a third response message to an MME, initiating a group calling resource release request to the SCC and the MME so that the SCC and the MME release the group calling resource of the group calling, and after receiving the group calling resource release request initiated by the SCC, the MME forwards the group calling resource release request initiated by the SCC to a gateway, an eNB where the group calling is located and UE where the group calling is located so that the gateway, the eNB and the UE release the group calling resource of the group calling.
4, group calling service processing system of broadband cluster communication system, including:
an information sending unit, which is configured to send, by a gateway, group call data loss information including a group number and an identifier of a group call to a mobility management entity MME after the group call is established and when a group call downlink data packet of the group call is not received, so that the MME queries an exchange control center SCC according to the group number and the identifier of the group call, and feeds back a response message when the group call context of the group call does not exist in the SCC or the group call context of the group call exists in the SCC and a speaking right of the group call is allocated;
resource releasing unit, if not receiving the response information fed back by MME, releasing the group calling resource of the group calling of the gateway;
an determining unit, configured to determine whether to release the group call resource of the group call according to the received response message of the MME if the response message fed back by the MME is received;
wherein the th determination unit comprises:
an th determining subunit, configured to determine whether a received response message of the MME is a th response message, where the th response message is a response message fed back by the MME when no group call context of the group call exists in the SCC;
, a waiting subunit, if the received response message is the response message, then waiting for the group call resource release request initiated by the MME, so as to release the group call resource of the group call according to the group call resource release request initiated by the MME.
The group call service processing system of broadband trunking communication system of 5, , characterized by, including:
information receiving unit, mobility management entity MME receives the group call data loss information including group number and identification of group call sent by gateway;
an th judgment unit, for judging whether there is the group calling context of the group calling in the MME according to the group number and the identification;
a second information sending unit, configured to send a second group call data loss information including the group number and the identifier to the SCC if the group call context of the group call exists, so that the SCC queries the SCC according to the group number and the identifier of the group call, and feeds back a response message when the group call context of the group call exists in the SCC and the speaking right of the group call is already allocated;
, a release request unit, which initiates a group call resource release request to the MME, the gateway, the eNB where the group call is located, and the UE where the group call is located if no response message fed back by the SCC is received, so that the MME, the gateway, the eNB, and the UE release the group call resource of the group call;
a second determining unit, configured to determine whether to release the group call resource of the group call according to the received response message fed back by the SCC if the response message fed back by the SCC is received; the method is specifically used for:
judging whether a received response message of the SCC is a third response message, wherein the third response message is a response message fed back by the MME when a group call context of the group call exists in the SCC and the speaking right of the group call is distributed;
if the received response message is the third response message, sending a second response message to the gateway, waiting for a group call resource release request initiated by the SCC, releasing the group call resource of the group call according to the group call resource release request initiated by the SCC, and after receiving the group call resource release request initiated by the SCC, forwarding the group call resource release request initiated by the SCC to the gateway, the eNB where the group call is located and the UE where the group call is located, so that the gateway, the eNB and the UE release the group call resource of the group call.
6, kinds of broadband trunking communication system's group calling service processing system, characterized by, including:
a second information receiving unit, wherein the switching control center SCC receives second group call data loss information including a group number and an identifier of a group call, which is sent by the mobility management entity MME;
a second judging unit, for judging whether the group call context of the group call exists in the SCC according to the group number and the identification of the group call;
a third judging unit, if the third judging unit exists, judging whether the speaking right of the group calling is distributed;
and a second release request unit, configured to send a third response message to an MME if the group call resource is allocated, initiate a group call resource release request to the SCC and the MME, so that the SCC and the MME release the group call resource of the group call, and forward, by the MME, the group call resource release request initiated by the SCC to a gateway, an eNB where the group call is located, and a UE where the group call is located, after receiving the group call resource release request initiated by the SCC, so that the gateway, the eNB, and the UE release the group call resource of the group call.
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