CN102215458A - Digital cluster communication system based on long term evolution technology as well as base station and terminal - Google Patents
Digital cluster communication system based on long term evolution technology as well as base station and terminal Download PDFInfo
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Abstract
The invention provides a digital cluster communication system based on a long term evolution (LTE) technology as well as a base station and a cluster user terminal; by adding a new cluster signaling radio bearer in the digital cluster communication system based on the LTE technology, such as a T-SRB0 capable of periodically and repeatedly sending a cluster group calling establishing message, a T-SRB1 used for sending a cluster group calling releasing message and the like, the cluster user terminal can access into the digital cluster communication system based on the LTE technology in delay.
Description
Technical Field
The present invention relates to mobile communication technology, and in particular, to a digital trunking communication system based on long term evolution technology, a base station, and a trunking user terminal.
Background
Due to the characteristics of special scheduling, group calling, quick calling and the like, the digital trunking communication system plays a huge role in the field of professional communication, and the digital trunking communication system is popular in the global range since the middle of the 90 s of the 20 th century, is widely applied and has good economic and social benefits. The existing digital trunking communication system mainly comprises: terrestrial trunked Radio (TETRA), Integrated Digital enhanced networks (iDEN), Open trunked Architecture (GoTa), and GT800 systems, among others.
Trunking services are the most basic services provided by digital trunking communications systems, allowing trunking user terminals to set up group calls to a certain group of trunking user terminals belonging to a given area. For a digital trunking communication system, call setup time (the time period from call initiation to speech) is an important performance index, and the time mainly depends on the complexity of signaling interaction between a trunking user terminal and a network side, transmission delay between network element devices, a processing mode of the network element devices on signaling, and the like. Because the existing digital trunking communication System is mostly realized based on Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA) technology, a base station needs to be uniformly controlled by a base station controller and cannot directly communicate with a core network, so that more signaling interactions are caused in the trunking service establishment process, and the call establishment time is further prolonged. In addition, in the existing digital trunking communication system, trunking services are all carried in a circuit domain, so that sharing of service channels cannot be realized, and resource utilization rate is reduced.
Therefore, a digital trunking communication system based on Long Term Evolution (LTE) technology is proposed in the prior art, and trunking services are implemented based on the system. Since the conventional LTE technology is designed for a point-to-point communication service and the trunking service is a point-to-multipoint service, it is necessary to modify an air interface channel of the conventional LTE technology, add a new logical channel and a new transport channel, and the like. After the digital trunking communication system based on the LTE technology is adopted, trunking services are borne in a packet domain, so that sharing of service channels can be completely realized, the resource utilization rate is greatly improved, and the operation cost of the digital trunking communication system is further reduced; in addition, the LTE technology adopts a full IP flat network architecture, and a base station is directly connected with a core network, so that the interaction of network side internal signaling in the call establishment process is reduced, and the call establishment time is shortened.
However, the digital trunking communication system based on the LTE technology also has certain problems: an important characteristic of a traditional digital trunking communication system is that late access of trunking user terminals is considered, the late access means that in the process of establishing trunking services, because a plurality of called trunking user terminals are available, it is difficult to ensure that all trunking user terminals called each time can be accessed at one time, for those trunking user terminals which cannot be accessed because they are not in a service area or are not started, the system can delay the call again after a period of time passes, namely, the late access, and repeat the process until the trunking services are released, thereby ensuring that all trunking user terminals can be accessed into the trunking services in time; however, the existing digital trunking communication system based on the LTE technology cannot realize the late access of the trunking user terminal.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a digital trunking communication system based on long term evolution technology, which can implement late access of trunking user terminals.
Another object of the present invention is to provide a base station, which can implement late access of trunking user terminals in a digital trunking communication system based on long term evolution technology.
Still another object of the present invention is to provide a trunking user terminal, which can implement late access of the trunking user terminal in a digital trunking communication system based on long term evolution technology.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a digital trunking communication system based on Long Term Evolution (LTE) technology defines trunking signaling radio bearers (T-SRBs) 0 and (T-SRBs) 1 for a Trunking Control Channel (TCCH) in the digital trunking communication system based on the LTE technology in advance; the signaling messages carried on the T-SRB0 and the T-SRB1 are transmitted on different TCCH logical channels and are distinguished by using logical channel number identifiers (LCID); the system comprises:
the base station is used for sending a cluster paging message on a cluster paging control channel TPCCH, wherein the cluster paging message carries a group identifier and a radio network temporary identifier G-RNTI, and after a preset time length, sending a cluster group call establishment message on a T-SRB0 of the TCCH channel; storing the transmitted paging message of the cluster group and the call establishment message of the cluster group, and periodically and repeatedly transmitting the paging message of the cluster group and the call establishment message of the cluster group after a preset delay time for access; determining whether a trunking group call release message is received on the T-SRB1, if yes, releasing a trunking group paging message and a trunking group call setup message which are periodically sent, and sending a trunking group call release message on the T-SRB 1;
the cluster user terminal is used for receiving the cluster paging message, acquiring the group identifier and the G-RNTI carried in the cluster paging message, determining whether the cluster user terminal belongs to the group identifier, if not, finishing the processing, if so, further determining whether the G-RNTI is received for the first time, if so, establishing a cluster control plane channel corresponding to the G-RNTI, and then carrying out subsequent processing, and if not, directly carrying out the subsequent processing; and the G-RNRI is used for receiving the signaling message carried on the TCCH, and the LCID is used for determining whether the signaling message is a trunking group call establishment message sent on T-SRB0 or a trunking group call release message sent on T-SRB1, if the signaling message is the trunking group call establishment message, whether the trunking group call establishment message is received for the first time is further determined, if the trunking group call establishment message is received for the first time, the configuration and establishment of a trunking call service plane entity are carried out, if the trunking group call release message is not received for the first time, the processing is not carried out, and if the signaling message is the trunking group call release message, the group call resource release is carried out.
A base station is applied to a digital trunking communication system based on a Long Term Evolution (LTE) technology, and a trunking signaling radio bearer (T-SRB 0) and a trunking signaling radio bearer (T-SRB 1) are defined in advance for a Trunking Control Channel (TCCH) in the digital trunking communication system based on the LTE technology; the signaling messages carried on the T-SRB0 and the T-SRB1 are transmitted on different TCCH logical channels and are distinguished by using logical channel number identifiers (LCID); the base station includes:
a first sending unit, configured to send a trunking paging message on a trunking paging control channel TPCCH, where the trunking paging message carries a group identifier and a radio network temporary identifier G-RNTI, and after a predetermined time duration, send a trunking call setup message on a T-SRB0 of the TCCH channel; storing the transmitted paging message of the cluster group and the call establishment message of the cluster group, and periodically and repeatedly transmitting the paging message of the cluster group and the call establishment message of the cluster group after a preset delay time for access;
a second sending unit, configured to determine whether a trunking group call release message is received on the T-SRB1, if so, notify the first sending unit to release the periodically sent trunking group paging message and trunking group call setup message, and send a trunking group call release message on the T-SRB 1.
A trunking user terminal is applied to a digital trunking communication system based on a Long Term Evolution (LTE) technology, and a trunking signaling radio bearer (T-SRB 0 and T-SRB 1) is defined for a Trunking Control Channel (TCCH) in the digital trunking communication system based on the LTE technology in advance; the signaling messages carried on the T-SRB0 and the T-SRB1 are transmitted on different TCCH logical channels and are distinguished by using logical channel number identifiers (LCID); the cluster user terminal includes:
the first processing unit is used for receiving a trunking group paging message sent by a base station on a trunking paging control channel TPCCH, acquiring a group identifier and a radio network temporary identifier G-RNTI carried in the trunking group paging message, determining whether a trunking user terminal belongs to the group identifier, if not, finishing the processing, if so, further determining whether the G-RNTI is received for the first time, if so, establishing a trunking control plane channel corresponding to the G-RNTI, then informing the second processing unit to execute a self function, and if not, directly informing the second processing unit to execute the self function;
the second processing unit is configured to receive the signaling message carried on the TCCH channel by using the G-RNRI, determine whether the signaling message is a trunking group call setup message sent on T-SRB0 or a trunking group call release message sent on T-SRB1 by using the LCID, further determine whether the trunking group call setup message is received for the first time if the signaling message is the trunking group call setup message, configure and establish a trunking call service plane entity if the signaling message is received for the first time, perform no processing if the signaling message is not received for the first time, and perform group call resource release if the signaling message is the trunking group call release message.
Therefore, by adopting the technical scheme of the invention, the delayed access of the trunking user terminal in the digital trunking communication system based on the LTE technology is realized by adding a new trunking signaling radio bearer, such as T-SRB0 used for sending trunking group call establishment messages and capable of periodically and repeatedly sending trunking group call release messages, T-SRB1 and the like in the digital trunking communication system based on the LTE technology.
Drawings
Fig. 1 is a schematic diagram of a downlink mapping relationship in a conventional digital trunking communication system based on LTE technology.
Fig. 2 is a schematic structural diagram of the digital trunking communication system based on the LTE technology.
Fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a composition structure of an embodiment of a cluster user terminal of the present invention.
Detailed Description
As can be seen from the foregoing description, in the prior art, trunking services can be implemented in a digital trunking communication system based on LTE technology by modifying an air interface channel of LTE technology and adding a new logical channel and a new transport channel.
The above modifications are mainly reflected in: in the air interface protocol of the LTE technology, a Media Access Control (MAC) layer provides data transmission services on logical channels, and different data transmission service types need to correspond to different logical Channel types, so that, for the characteristics of a cluster service point-to-multipoint, a cluster Paging Control Channel (TPCCH) for carrying cluster Paging Control information, a cluster Control Channel (TCCH) for carrying Control information such as cluster group call setup, group call release, and speech right notification, and a cluster service Channel (TTCH) for transferring cluster point-to-multipoint service data are newly added. In addition, the transport Channel is a Service Access Point (SAP) between the physical layer and the MAC sublayer, and is mainly used for transmitting an information transmission service provided by the physical layer to the MAC sublayer or a higher layer, and according to the characteristics of the TPCCH Channel, a transport Channel for carrying the TPCCH Channel, that is, a Trunking Paging transport Channel (TPCH) is newly added.
Fig. 1 is a schematic diagram of a downlink mapping relationship in a conventional digital trunking communication system based on LTE technology. As shown in fig. 1, the mapping approach of the TPCCH channel is: TPCCH Channel-TPCH Channel-Physical Downlink Shared Channel (PDSCH); the mapping approach of the TTCH channel is as follows: TTCH channel-Downlink shared channel (DL-SCH) -PDSCH channel; the mapping way of the TCCH channel is as follows: TCCH channel-DL-SCH channel and PDSCH channel.
In order to implement the scheme of the invention, three cluster signaling radio bearers T-SRB0, T-SRB1 and T-SRB2 are further defined for the TCCH channel on the basis of the scheme. The T-SRB0 is used for signaling the trunking group call establishment message, the T-SRB1 is used for signaling the trunking group call release message, and the T-SRB2 is used for signaling the control information such as the speaking right notification. The signaling messages for T-SRB0, T-SRB1, and T-SRB2 are transmitted on different TCCH logical channels, distinguished by logical Channel number identification (LCID). Wherein, directly related to the scheme of the invention are T-SRB0 and T-SRB1, in order to realize the late access of the trunking user terminal, it needs to ensure that the trunking group call establishment message carried on T-SRB0 can be periodically and repeatedly sent, and when the trunking group call release message is carried on T-SRB1, the trunking group call establishment message carried on T-SRB0 is released.
Based on the above description, fig. 2 is a schematic structural diagram of the digital trunking communication system based on the LTE technology. As shown in fig. 2, includes: a base station 21 and a trunking user terminal 22; the number of the cluster user terminals 22 is usually multiple, in this embodiment, only one cluster user terminal is shown for simplifying the drawing, and the processing modes of the cluster user terminals 22 are the same. Wherein,
a base station 21, configured to send a cluster paging message on the TPCCH, where the cluster paging message carries a group Identifier and a Radio Network Temporary Identifier (G-RNTI), and after a predetermined time, send a cluster call setup message on a T-SRB0 of the TCCH channel; storing the transmitted paging message of the cluster group and the call establishment message of the cluster group, and periodically and repeatedly transmitting the paging message of the cluster group and the call establishment message of the cluster group after a preset delay time for access; determining whether a trunking group call release message is received on the T-SRB1, if so, releasing a trunking group paging message and a trunking group call establishment message which are periodically sent, and sending the trunking group call release message on the T-SRB 1;
the trunking user terminal 22 is configured to receive the trunking paging message, obtain a group identifier and a G-RNTI carried in the trunking paging message, determine whether the group identifier and the G-RNTI belong to the group identifier, if the group identifier and the G-RNTI do not belong to the group identifier, end the processing, if the group identifier and the G-RNTI belong to the group identifier are received for the first time, further determine whether the G-RNTI is received for the first time, if the G-RNTI is received for the first time, establish a trunking control plane channel corresponding to the G-RNTI, and then perform subsequent processing, and if the G-RNTI is not received for the first time; using the G-RNRI to receive the signaling message carried on the TCCH channel, and using LCID to determine whether the signaling message is the trunking group call establishment message sent on T-SRB0 or the trunking group call release message sent on T-SRB1, if the signaling message is the trunking group call establishment message, further determining whether the trunking group call establishment message is received for the first time, if the trunking group call establishment message is received for the first time, configuring and establishing the trunking call service plane entity, if the trunking group call service plane entity is not received for the first time, not processing, if the trunking group call release message is the trunking group call release message, releasing the group call resources.
Specifically, the processing flow of the base station 21 mainly includes:
1) and sending a cluster paging message on a TPCCH channel, wherein the cluster paging message carries information such as a group identifier, a G-RNTI and the like.
The base station 21 will inform each trunking user terminal 22 of the sending opportunity and sending period of the TPCCH channel in advance through a broadcast message, where the sending opportunity refers to the sending location information of the TPCCH channel, that is, the subframe of which radio frame the TPCCH channel is carried on for sending, the subframe is usually the P0 subframe, and subsequently, when the trunking group paging message needs to be sent on the TPCCH channel, the base station 21 will send at the specified location.
The role of the group identity and the G-RNTI will be described later.
2) After sending out the trunking paging message, the base station 21 sends the trunking call setup message on the T-SRB0 of the TCCH channel after a predetermined amount of time, i.e., after a period of delay.
3) If the step 1) and 2) is to transmit the trunking group paging message and the trunking group call setup message for the first time, the base station 21 will store these two messages, and then periodically repeat the steps 1) and 2) after a predetermined delay of access, that is, periodically repeat the transmission of the trunking group paging message and the trunking group call setup message until the trunking group call release message is received on the T-SRB1 of the TCCH channel. Therefore, the base station 21 needs to determine in real time whether a trunking group call release message is received on the T-SRB1, and if so, release the periodically transmitted trunking group paging message and trunking group call setup message, and transmit the trunking group call release message on the T-SRB 1.
The time delay involved in each step is preset; in addition, how the base station 21 determines to which cluster user terminals 22 to send the cluster paging message, the cluster group call setup message, the cluster group call release message, and the like is the prior art and is not described; furthermore, how to receive the collect group call release message on the T-SRB1 is also prior art, such as being received from the core network, and the specific implementation is not described.
Based on the processing flow of the base station 21, the processing flow of the trunking user terminal 22 mainly includes:
1) after receiving the trunking group paging message sent by the base station 21 on the TPCCH channel, the trunking user terminal 22 acquires the group identifier and the G-RNTI carried therein, determines whether the terminal itself belongs to the group identifier, and how to determine that the terminal belongs to the prior art, if not, the process is ended, and if the terminal belongs to the group identifier, the step 2) is executed.
As can be seen from the foregoing description, the base station 21 will inform the clustered user terminals 22 of the transmission opportunity and transmission period of the TPCCH channel in advance through a broadcast message, so that the clustered user terminals 22 can periodically detect the TRCCH channel at the informed location to acquire the cluster paging message.
If the trunking user terminal 22 determines that it does not belong to the group identifier carried in the trunking paging message, it indicates that the trunking service is not related to itself, and therefore, no further subsequent processing is required.
2) The trunking user terminal 22 determines whether the G-RNTI carried in the trunking paging message is received for the first time (because the base station 21 may periodically repeat sending), and if the G-RNTI is received for the first time, establishes a trunking Control plane channel corresponding to the G-RNTI, that is, related entities and contexts required by three trunking signaling Radio bearers for which a TCCH channel is to be generated, including a Packet Data Convergence Protocol (PDCP) entity, a Radio Link Control (RLC) entity, an MAC entity, a physical layer entity, and the like, and then executes step 3); if not, it indicates that the cluster control plane tunnel corresponding to the G-RNTI has been established before, so step 3) can be directly performed.
How to establish the cluster control plane channel corresponding to the G-RNTI is the prior art and is not described.
3) The trunking user terminal 22 receives the signaling message carried on the TCCH channel by using the G-RNTI, and determines whether the signaling message is a trunking group call setup message sent on T-SRB0 or a trunking group call release message sent on T-SRB1 by using the LCID, and of course, may be a message such as a speaking right notification sent on T-SRB2, and since this situation has no direct relation with the scheme of the present invention, it is not introduced; if the message is the trunking group call establishment message, executing step 4), and if the message is the trunking group call release message, executing step 5).
4) The trunking user terminal 22 determines whether the trunking group call establishment message is received for the first time (because the base station 21 will periodically repeat transmission), and if the trunking group call establishment message is received for the first time, performs configuration and establishment of the trunking call service plane entity, that is, establishes the TTCH channel to receive trunking service data, and if the trunking call service plane entity is not received for the first time, it indicates that the configuration and establishment of the trunking call service plane entity have been completed before, and therefore, the message is discarded without performing repeat processing.
How to perform configuration and establishment of a group call service plane entity is also prior art.
5) If the trunking group call release message is received in step 3), the trunking user terminal 22 will release the group call resources, that is, release the previously established trunking control plane channel and trunking call service plane entity.
The specific structures of the base station 21 and the clustered user terminals 22 shown in fig. 2 are shown in fig. 3 and 4, respectively.
Fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in fig. 3, includes:
a first sending unit 31, configured to send a cluster group paging message on a TPCCH channel, where the group paging message carries a group identifier and a G-RNTI, and after a predetermined time duration, send a cluster group call setup message on a T-SRB0 of a TCCH channel; storing the transmitted paging message of the cluster group and the call establishment message of the cluster group, and periodically and repeatedly transmitting the paging message of the cluster group and the call establishment message of the cluster group after a preset delay time for access;
a second sending unit 32, configured to determine whether a trunking group call release message is received at T-SRB1, if so, notify the first sending unit 31 to release the periodically sent trunking group paging message and trunking group call setup message, and send a trunking group call release message at T-SRB 1.
In addition, the base station shown in fig. 3 may further include: the broadcast unit 33 is configured to notify the cluster user terminals of the sending opportunity and the sending period of the TPCCH channel through a broadcast message, where the sending opportunity is the sending location information of the TPCCH channel.
Fig. 4 is a schematic diagram of a composition structure of an embodiment of a cluster user terminal of the present invention. As shown in fig. 4, includes:
a first processing unit 41, configured to receive a trunking group paging message sent by a base station on a TPCCH channel, obtain a group identifier and a G-RNTI carried in the paging message, determine whether a trunking user terminal belongs to the group identifier, if not, end the processing, if so, further determine whether the G-RNTI is received for the first time, if so, establish a trunking control plane channel corresponding to the G-RNTI, and then notify a second processing unit 42 of executing a self-function, and if not, directly notify the second processing unit 42 of executing the self-function;
a second processing unit 42, configured to receive the signaling message carried on the TCCH channel by using the G-RNRI, and determine, by using the LCID, whether the signaling message is the trunking group call setup message sent on T-SRB0 or the trunking group call release message sent on T-SRB1, if the signaling message is the trunking group call setup message, further determine whether the trunking group call setup message is received for the first time, if the trunking group call setup message is received for the first time, perform configuration and setup of a trunking call service plane entity, if the signaling message is not received for the first time, perform no processing, and if the signaling message is the trunking group call release message, perform group call resource release.
In addition, the cluster user terminal shown in fig. 4 may further include:
a receiving unit 43, configured to receive a broadcast message from a base station, and acquire a sending opportunity and sending cycle information of a TPCCH channel carried in the broadcast message, where the sending opportunity is sending location information of the TPCCH channel.
For a specific working flow of the embodiments of the base station and the clustered user equipment shown in fig. 3 and 4, reference is made to the corresponding description in the system embodiment shown in fig. 2, and details are not repeated here.
In short, by adopting the technical scheme of the invention, the delayed access of the trunking user terminal can be realized in the digital trunking communication system based on the LTE technology.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A digital trunking communication system based on Long Term Evolution (LTE) technology is characterized in that trunking signaling radio bearers (T-SRB 0 and T-SRB 1) are defined in advance for a Trunking Control Channel (TCCH) in the digital trunking communication system based on LTE technology; the signaling messages carried on the T-SRB0 and the T-SRB1 are transmitted on different TCCH logical channels and are distinguished by using logical channel number identifiers (LCID); the system comprises:
the base station is used for sending a cluster paging message on a cluster paging control channel TPCCH, wherein the cluster paging message carries a group identifier and a radio network temporary identifier G-RNTI, and after a preset time length, sending a cluster group call establishment message on a T-SRB0 of the TCCH channel; storing the transmitted paging message of the cluster group and the call establishment message of the cluster group, and periodically and repeatedly transmitting the paging message of the cluster group and the call establishment message of the cluster group after a preset delay time for access; determining whether a trunking group call release message is received on the T-SRB1, if yes, releasing a trunking group paging message and a trunking group call setup message which are periodically sent, and sending a trunking group call release message on the T-SRB 1;
the cluster user terminal is used for receiving the cluster paging message, acquiring the group identifier and the G-RNTI carried in the cluster paging message, determining whether the cluster user terminal belongs to the group identifier, if not, finishing the processing, if so, further determining whether the G-RNTI is received for the first time, if so, establishing a cluster control plane channel corresponding to the G-RNTI, and then carrying out subsequent processing, and if not, directly carrying out the subsequent processing; and the G-RNRI is used for receiving the signaling message carried on the TCCH, and the LCID is used for determining whether the signaling message is a trunking group call establishment message sent on T-SRB0 or a trunking group call release message sent on T-SRB1, if the signaling message is the trunking group call establishment message, whether the trunking group call establishment message is received for the first time is further determined, if the trunking group call establishment message is received for the first time, the configuration and establishment of a trunking call service plane entity are carried out, if the trunking group call release message is not received for the first time, the processing is not carried out, and if the signaling message is the trunking group call release message, the group call resource release is carried out.
2. The system of claim 1, wherein the base station comprises:
a first sending unit, configured to send a cluster group paging message on the TPCCH channel, where the cluster group paging message carries a group identifier and a G-RNTI, and send a cluster group call setup message on the T-SRB0 of the TCCH channel after a predetermined time period; storing the transmitted paging message of the cluster group and the call establishment message of the cluster group, and periodically and repeatedly transmitting the paging message of the cluster group and the call establishment message of the cluster group after a preset delay time for access;
a second sending unit, configured to determine whether a trunking group call release message is received on the T-SRB1, if so, notify the first sending unit to release the periodically sent trunking group paging message and trunking group call setup message, and send a trunking group call release message on the T-SRB 1.
3. The system of claim 2, wherein the base station further comprises:
and the broadcasting unit is used for informing the sending opportunity and the sending period of the TPCCH to the trunking user terminal through a broadcast message, wherein the sending opportunity is the sending position information of the TPCCH.
4. A system according to claim 1, 2 or 3, wherein the group of user terminals comprises:
a first processing unit, configured to receive the cluster group paging message, obtain a group identifier and a G-RNTI carried in the group paging message, determine whether the group identifier and the G-RNTI belong to the group identifier, if the group identifier and the G-RNTI do not belong to the group identifier, end the processing, if the group identifier and the G-RNTI belong to the group identifier are received for the first time, further determine whether the G-RNTI is received for the first time, if the G-RNTI is received for the first time, establish a cluster control plane channel corresponding to the G-RNTI, and then notify a second processing unit to execute a self function, if the G-RNTI is not received for the first time, directly notify the second;
the second processing unit is configured to receive the signaling message carried on the TCCH channel by using the G-RNRI, determine whether the signaling message is a trunking group call setup message sent on T-SRB0 or a trunking group call release message sent on T-SRB1 by using the LCID, further determine whether the trunking group call setup message is received for the first time if the signaling message is the trunking group call setup message, configure and establish a trunking call service plane entity if the signaling message is received for the first time, perform no processing if the signaling message is not received for the first time, and perform group call resource release if the signaling message is the trunking group call release message.
5. The system of claim 4, wherein the clustered user terminals further comprise:
and the receiving unit is used for receiving the broadcast message from the base station and acquiring the sending opportunity and sending cycle information of the TPCCH carried in the broadcast message, wherein the sending opportunity is the sending position information of the TPCCH.
6. A base station is characterized in that the base station is applied to a digital trunking communication system based on a Long Term Evolution (LTE) technology, and trunking signaling radio bearers T-SRB0 and T-SRB1 are defined in advance for a Trunking Control Channel (TCCH) in the digital trunking communication system based on the LTE technology; the signaling messages carried on the T-SRB0 and the T-SRB1 are transmitted on different TCCH logical channels and are distinguished by using logical channel number identifiers (LCID); the base station includes:
a first sending unit, configured to send a trunking paging message on a trunking paging control channel TPCCH, where the trunking paging message carries a group identifier and a radio network temporary identifier G-RNTI, and after a predetermined time duration, send a trunking call setup message on a T-SRB0 of the TCCH channel; storing the transmitted paging message of the cluster group and the call establishment message of the cluster group, and periodically and repeatedly transmitting the paging message of the cluster group and the call establishment message of the cluster group after a preset delay time for access;
a second sending unit, configured to determine whether a trunking group call release message is received on the T-SRB1, if so, notify the first sending unit to release the periodically sent trunking group paging message and trunking group call setup message, and send a trunking group call release message on the T-SRB 1.
7. The base station of claim 6, further comprising:
and the broadcasting unit is used for informing the sending opportunity and the sending period of the TPCCH to the trunking user terminal through a broadcast message, wherein the sending opportunity is the sending position information of the TPCCH.
8. A trunking user terminal is applied to a digital trunking communication system based on Long Term Evolution (LTE) technology, and a trunking signaling radio bearer (T-SRB 0) and a trunking signaling radio bearer (T-SRB 1) are defined in advance for a Trunking Control Channel (TCCH) in the digital trunking communication system based on LTE technology; the signaling messages carried on the T-SRB0 and the T-SRB1 are transmitted on different TCCH logical channels and are distinguished by using logical channel number identifiers (LCID); the cluster user terminal includes:
the first processing unit is used for receiving a trunking group paging message sent by a base station on a trunking paging control channel TPCCH, acquiring a group identifier and a radio network temporary identifier G-RNTI carried in the trunking group paging message, determining whether a trunking user terminal belongs to the group identifier, if not, finishing the processing, if so, further determining whether the G-RNTI is received for the first time, if so, establishing a trunking control plane channel corresponding to the G-RNTI, then informing the second processing unit to execute a self function, and if not, directly informing the second processing unit to execute the self function;
the second processing unit is configured to receive the signaling message carried on the TCCH channel by using the G-RNRI, determine whether the signaling message is a trunking group call setup message sent on T-SRB0 or a trunking group call release message sent on T-SRB1 by using the LCID, further determine whether the trunking group call setup message is received for the first time if the signaling message is the trunking group call setup message, configure and establish a trunking call service plane entity if the signaling message is received for the first time, perform no processing if the signaling message is not received for the first time, and perform group call resource release if the signaling message is the trunking group call release message.
9. The clustered user terminal of claim 8 further comprising:
and the receiving unit is used for receiving the broadcast message from the base station and acquiring the sending opportunity and sending cycle information of the TPCCH carried in the broadcast message, wherein the sending opportunity is the sending position information of the TPCCH.
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