CN109547228B

CN109547228B - Transmission method, base station and cluster terminal of rail transit cluster service

Info

Publication number: CN109547228B
Application number: CN201710691492.7A
Authority: CN
Inventors: 汪振东; 蔡文涛; 袁乃华; 周金平
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2017-08-14
Filing date: 2017-08-14
Publication date: 2021-11-23
Anticipated expiration: 2037-08-14
Also published as: CN109547228A

Abstract

The invention provides a transmission method of a rail transit trunking service, a base station and a trunking terminal. The transmission method of the rail transit trunking service provided by the invention comprises the following steps: when the access network with the fault exists in the red network, the first cluster terminal resides in a cell corresponding to the blue network; the first cluster terminal is any terminal under the fault access network; the first cluster terminal sends an RRC connection establishment completion message carrying the PLMN identification of the red network to the blue network base station; the blue network base station determines core network equipment for transmitting the trunking service as red network core network equipment according to the PLMN identification of the red network; when the first cluster terminal is the initiating end of the cluster service, the first cluster terminal sends a data packet of the cluster service to the red network core network equipment; the red network core network equipment sends the data packet to the corresponding receiving end through the base station. The transmission method of the rail transit trunking service, the base station and the trunking terminal improve the reliability of trunking service transmission.

Description

Transmission method, base station and cluster terminal of rail transit cluster service

Technical Field

The present invention relates to communication engineering technologies, and in particular, to a transmission method, a base station, and a trunking terminal for a rail transit trunking service.

Background

The existing trunking service of the rail transit is carried by adopting a new generation Long Term Evolution (LTE) system, that is, the trunking service is carried by an LTE communication network. Compared with the previous generation Communication system, the new generation LTE system has a great advantage of being able to comprehensively bear various services in the rail transit project, such as Train Control-Based (CBTC) and trunking services, thereby greatly reducing the investment and maintenance cost of the client.

However, when the trunking service is carried through one LTE communication network, when at least one access network in the communication network fails, the trunking service is easily interrupted in a certain area or even the whole network, and further an adverse effect is caused to the operation of the whole railway.

Disclosure of Invention

The invention provides a transmission method of a rail transit trunking service, a base station and a trunking terminal, which are used for improving the reliability of trunking service transmission.

In a first aspect, the present invention provides a method for transmitting a rail transit trunking service, where the trunking service is carried over a red network that carries a rail integrated traffic service and a blue network that carries a CBTC service based on train control, where the priority of a frequency point of the red network is higher than that of a frequency point of the blue network, and each trunking terminal opens an account on a red network core network device, the method including:

when at least one access network of the red network fails and a first cluster terminal resides in a cell corresponding to the blue network, a blue network base station corresponding to the first cluster terminal determines core network equipment for transmitting cluster services as the red network core network equipment according to a Public Land Mobile Network (PLMN) identifier of the red network carried in a Radio Resource Control (RRC) connection establishment completion message sent by the first cluster terminal; the first cluster terminal is any terminal under the fault access network;

when a trunking service needs to be transmitted and at least one receiving end exists in a cell corresponding to the blue-network base station, after the bearer of the trunking service is established, the blue-network base station receives a data packet of the trunking service sent by the red-network core network equipment;

and the blue network base station sends the data packet to at least one corresponding receiving end.

In the method, before the bluetooth base station determines, according to the PLMN identifier of the red network carried in the RRC connection setup complete message sent by the first trunking terminal, that the core network device for transmitting trunking services is the core network device of the red network, the method further includes:

the blue network base station receives an RRC connection establishment request sent by the first cluster terminal; the RRC connection establishment request comprises an initial identifier of the first trunking terminal;

the blue network base station sends RRC connection configuration information to the first cluster terminal according to the RRC connection establishment request so that the first cluster terminal establishes RRC connection with the blue network base station;

correspondingly, after the determining, by the bluetooth base station, that the core network device for transmitting the trunking service is the red network core network device according to the PLMN identifier of the red network carried in the RRC connection setup complete message sent by the first trunking terminal, the method further includes:

and the blue network base station sends the initial identifier to the red network core network equipment, so that the red network core network equipment sends an authentication success message to the first cluster terminal after successfully authenticating the first cluster terminal according to the initial identifier.

In the method, the neighboring cells configured for the cells corresponding to the red network do not include the cells corresponding to the blue network, and the neighboring cells configured for the cells corresponding to the blue network do not include the cells corresponding to the red network.

In a second aspect, the present invention further provides a method for transmitting a rail transit trunking service, where the trunking service is carried through a red network for carrying a rail integrated traffic service and a blue network for carrying a CBTC service based on train control, where the priority of a frequency point of the red network is higher than that of a frequency point of the blue network, and each trunking terminal opens an account on a red network core network device, including:

when at least one access network of the red network fails, a first cluster terminal reselects a cell and resides in a cell corresponding to a blue network, and the first cluster terminal is any terminal under the failed access network;

a first trunking terminal sends a Radio Resource Control (RRC) connection establishment completion message to a corresponding blue-line network base station, wherein the RRC connection establishment completion message carries an identifier of a Public Land Mobile Network (PLMN) of a red network, so that the blue-line network base station determines core network equipment for transmitting trunking services as the red network core network equipment according to the identifier of the PLMN;

when the first trunking terminal is an initiating terminal of a trunking service, after the bearer of the trunking service is established, the first trunking terminal sends a data packet of the trunking service to the red network core network device, so that after the red network core network device sends the data packet to the blue network base station and/or the red network base station, the blue network base station and/or the red network base station respectively send the data packet to at least one receiving terminal corresponding to each of the blue network base station and/or the red network base station, and the receiving terminals are terminals belonging to the same group as the initiating terminal.

As described above, before the first trunking terminal sends the RRC connection setup complete message to the corresponding bluetooth base station, the method further includes:

the first cluster terminal sends an RRC connection establishment request to the blue-net base station; the RRC connection establishment request comprises an initial identification of the initiating terminal;

the first trunking terminal receives RRC connection configuration information sent by the blue-net base station according to the RRC connection establishment request, and establishes RRC connection with the blue-net base station according to the RRC connection configuration information;

correspondingly, after the first trunking terminal sends a radio resource control RRC connection setup complete message to the corresponding bluetooth base station, the method further includes:

and the first cluster terminal receives an authentication success message sent by the red network core network equipment according to the initial identifier.

The method as described above, further comprising:

when at least one fault access network of the red network is recovered to be normal and a second cluster terminal belongs to the cluster terminal under the access network recovered to be normal, the second cluster terminal performs cell reselection and resides in a cell corresponding to the red network;

when the second trunking terminal is an initiating terminal of the trunking service, after the bearer of the trunking service is established, the second trunking terminal sends a data packet of the trunking service to the red network core network device, so that the red network core network device sends the data packet to at least one receiving terminal corresponding to the red network core network device through the red network base station and/or the blue network base station, and the initiating terminal is a terminal belonging to the same group with the receiving terminal.

In a third aspect, the present invention further provides a base station, where a trunking service is carried through a red network that carries a rail integrated traffic service and a blue network that carries a CBTC service based on train control, where a priority of a frequency point of the red network is higher than a priority of a frequency point of the blue network, and each trunking terminal opens an account on the red network core network device, where the base station includes:

a determining module, configured to determine, when at least one access network of the red network fails and a first trunking terminal resides in a cell corresponding to the blue network, a core network device for transmitting trunking services as the red network core network device according to a public land mobile network PLMN identifier of the red network, where the PLMN identifier is carried in a radio resource control RRC connection setup complete message sent by the first trunking terminal; the first cluster terminal is a cluster terminal which corresponds to the base station and is under a fault access network;

a receiving module, configured to receive a data packet of the trunking service sent by the red network core network device after a bearer of the trunking service is established when the trunking service needs to be transmitted and at least one receiving end exists in a cell corresponding to the base station;

and the sending module is used for sending the data packet to at least one corresponding receiving end.

In a fourth aspect, the present invention further provides a trunking terminal, where a trunking service is carried through a red network carrying a rail integrated traffic service and a blue network carrying a train control based CBTC service, a priority of a frequency point of the red network is higher than a priority of a frequency point of the blue network, the trunking terminal opens an account on a red network core network device, and the trunking terminal is a trunking terminal in a fault access network when at least one access network of the red network fails, and includes:

the cell reselection module is used for reselecting the cell and residing in the cell corresponding to the blue network;

a sending module, configured to send a radio resource control, RRC, connection setup complete message to a corresponding blue-line network base station, where the RRC connection setup complete message carries an identifier of a PLMN of the red network, so that the blue-line network base station determines, according to the identifier of the PLMN, that core network equipment used for transmitting a trunking service is the red-line core network equipment;

the sending module is further configured to send, when the trunking terminal is an initiating terminal of a trunking service, a data packet of the trunking service to the red network core network device after the bearer of the trunking service is established, so that after the red network core network device sends the data packet to the blue network base station and/or the red network base station, the blue network base station and/or the red network base station respectively send the data packet to at least one corresponding receiving terminal, where the receiving terminal is a terminal belonging to the same group as the initiating terminal.

In a fifth aspect, the present invention further provides a system, including the base station in the third aspect and the trunking terminal in the fourth aspect.

The transmission method of the rail transit trunking service comprises the following steps: when at least one access network of the red network fails, the first cluster terminal reselects the cell and resides in the cell corresponding to the blue network; the first cluster terminal is any terminal under the fault access network; after establishing RRC connection with the blue-net base station at the first cluster terminal, sending an RRC connection establishment completion message to the blue-net base station, wherein the RRC connection establishment completion message carries a PLMN identification of a red net; the Bluetooth base station is a base station corresponding to a service cell where the first cluster terminal is located; the blue network base station determines core network equipment for transmitting the trunking service as red network core network equipment according to the PLMN identification of the red network; when the first cluster terminal is the initiating end of the cluster service, after the bearer of the cluster service is established, the first cluster terminal sends the data packet of the cluster service to the red network core network equipment; the red network core network equipment sends the data packet to at least one base station where each receiving end is located, and each base station sends the data packet of the cluster service to the corresponding receiving end. The transmission method of the rail transit trunking service improves the reliability of trunking service transmission.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a system architecture diagram provided herein;

fig. 2 is a signaling flow chart i of a transmission method of a rail transit trunking service provided by the present invention;

fig. 3 is a signaling flow chart of a transmission method of a rail transit trunking service provided by the present invention;

fig. 4 is a signaling flow chart of a transmission method of a rail transit trunking service provided by the present invention;

fig. 5 is a signaling flowchart of a transmission method of a rail transit trunking service provided by the present invention;

fig. 6 is a schematic structural diagram of a base station according to a first embodiment of the present invention;

fig. 7 is a schematic structural diagram of a cluster terminal according to a first embodiment of the present invention;

fig. 8 is a schematic structural diagram of a second cluster terminal according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an embodiment of a transmission system of a rail transit trunking service provided in the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The cluster service in the embodiment of the invention refers to the cluster service on the rail transit.

FIG. 1 is a system architecture diagram provided herein; referring to fig. 1, the system architecture includes a first core network device 11, a second core network device 12, a plurality of first base stations 13, a plurality of second base stations 14, and a plurality of trunking terminals 15, where the trunking terminal 15 may be a vehicle-mounted communication terminal or a handheld station. The first core network device 11 and the plurality of first base stations 13 are devices of a red network for carrying rail transit integrated services, and the second core network device 12 and the plurality of second base stations 14 are devices of a blue network for carrying CBTC services. The first base station 13 and the second base station 14 are configured with frequency priorities: the priority of the frequency point of the red network is higher than that of the frequency point of the blue network; the bluetooth base station is also configured with a Radio Access Network Sharing (RAN Sharing for short) feature. Each trunking terminal 15 opens an account on the first core network device 11, that is, the basic attribute information of each trunking terminal 15 is stored on the first core network device 11. The basic attribute information includes contents referred to the relevant standards.

Specifically, since the priority of the frequency point of the red network is higher than that of the frequency point of the blue network, when each access network of the red network normally works, the trunking service is completed through each device of the red network. When at least one access network (base station fault or network fault corresponding to the base station) of the red network has a fault, each first cluster terminal in each cell corresponding to each faulty access network resides in a cell corresponding to the blue network through cell reselection and establishes RRC connection with the corresponding blue network base station, after the RRC connection is established with the blue network base station, the first cluster terminal is routed to a core network of the red network according to RAN Sharing characteristics of the blue network base station, and the cluster service is completed together through red network core network equipment, the blue network base station and a non-faulty base station of the red network (when a receiving end exists in the cell corresponding to the red network). According to the transmission method of the rail transit trunking service, due to the fact that two networks are adopted to bear the trunking service, and the RAN Sharing characteristic is configured in the blue network base station, under the condition that one network base station fails, the other network can continue to bear the trunking service, and reliability of trunking service transmission is improved.

The following describes the transmission method of the rail transit trunking service in detail by using specific embodiments.

Fig. 2 is a signaling flow chart of a first transmission method of a rail transit trunking service provided by the present invention, as shown in fig. 2, the method of this embodiment may include:

step S101, when at least one access network of the red network fails, the first cluster terminal reselects a cell and resides in the cell corresponding to the blue network; the first cluster terminal is any terminal under the fault access network;

step S102, after the first cluster terminal establishes RRC connection with the blue-line network base station, sending an RRC connection establishment completion message to the blue-line network base station, wherein the RRC connection establishment completion message carries PLMN identification of a red network; the Bluetooth base station is a base station corresponding to a service cell where the first cluster terminal is located;

step S103, the blue network base station determines core network equipment for transmitting the trunking service as red network core network equipment according to the PLMN identification of the red network;

and when the first cluster terminal is the initiating terminal of the cluster service, executing the step S104 to the step S106.

Step S104, after the load of the cluster service is established, the first cluster terminal sends a data packet of the cluster service to the red network core network equipment;

when at least one receiving terminal exists in the cell corresponding to the blue-net base station and all the receiving terminals are in the cell corresponding to the blue-net, executing the steps S105 to S106; the receiving end is a terminal belonging to the same group with the initiating end;

step S105, the red network core network equipment sends the data packet of the cluster service to the blue network base station;

step S106, the blue network base station sends the data packet of the cluster service to at least one corresponding receiving terminal.

When at least one receiving end exists in the cell corresponding to the blue-line network base station and at least one receiving end exists in the cell corresponding to the red-line network base station, executing the steps S107 to S110;

s107, the red network core network equipment sends the data packet of the cluster service to the blue network base station;

step S108, the red network core network equipment sends the data packet of the cluster service to the red network base station;

step S109, the blue-net base station sends the data packet of the cluster service to at least one corresponding receiving terminal;

step S110, the red network base station sends the data packet of the cluster service to at least one corresponding receiving terminal.

Specifically, the application scenario of this embodiment is that an access network with a fault exists in each access network of the red network. The access network comprises a base station and a network corresponding to the base station, wherein the base station can comprise a Remote Radio Unit (RRU) and an indoor Baseband processing Unit (BBU), and the access network fault refers to an RRU fault and/or a BBU fault and/or a network fault corresponding to the base station.

When each access network of the red network works normally, the cluster service of the rail transit is completed through red network core network equipment and a red network base station; when each access network of the red network has a fault, the cluster service of the rail transit is completed through red network core network equipment and a blue network base station; when part of access networks of the red network have faults and receiving ends of the trunking service comprise terminals in cells corresponding to the red network and terminals in cells corresponding to the blue network, the trunking service of the rail transit is completed through red network core network equipment, a blue network base station and a red network base station; when the access networks of the red network all have faults and the receiving end of the cluster service only comprises the terminal residing in the cell corresponding to the red network, the initiating end of the cluster service is the terminal residing in the cell corresponding to the red network, and the cluster service of the rail transit is completed through the core network equipment of the red network and the base station of the red network.

The trunking service of the rail transit in this embodiment is carried by a red network carrying the rail integrated traffic service and a blue network carrying the CBTC service, frequency points of the red network are different from those of the blue network, a priority of the frequency point of the red network is higher than that of the frequency point of the blue network, each trunking terminal opens an account on red network core network equipment, only a PLMN of the red network is configured on a PLMN list of each trunking terminal, and the trunking terminal may be a vehicle-mounted communication terminal or a handheld station. The red net and the blue net are two identical networks, and the red net and the blue net are mature technologies in the prior art, and respective features of the red net and the blue net are not explained in detail in this embodiment.

Wherein, each base station of the red network is configured with information that the priority of the frequency point of the red network is the highest and the priority of the frequency point of the blue network is the second highest. The priority of the frequency point of the red network is the highest, the priority of the frequency point of the blue network is the second highest information, and the base stations of the blue network are also provided with RAN Sharing characteristics.

When at least one access network of the red network has a fault, for each fault access network, each first cluster terminal in each cell corresponding to the fault access network cannot continue to access the red network, and each first cluster terminal can be reselected to reside in a cell corresponding to a blue network with the next highest frequency point through the cell, namely reside in a cell corresponding to a network with the next highest priority frequency point. That is to say, when the access network a of the red network fails, the first trunking terminal in the access network a cannot interact with the base station a in the access network a, and at this time, each first trunking terminal may reselect and reside in the cell corresponding to the blue network through the cell, that is, each first trunking terminal interacts with the base station b in the blue network corresponding to the base station a in the red network. The area covered by the corresponding base station in the blue network and the red network is the same.

And after the first cluster terminal resides in the cell corresponding to the blue-line network, the first cluster terminal reselects the cell and resides in the cell corresponding to the blue-line network.

After the RRC connection between the first cluster terminal and the blue-line network base station is established, the first cluster terminal sends an RRC connection establishment completion message to the blue-line network base station, and the RRC connection establishment completion message carries the PLMN identification of the red network.

And the blue network base station receives the RRC connection establishment completion message, and determines the core network equipment for transmitting the trunking service as the red network core network equipment according to the PLMN identification of the red network carried in the RRC connection establishment completion message.

The first trunking terminal may select, from the PLMN identification list in the SIB1 system message, an identification of a PLMN in the PLMN list stored in the first trunking terminal, and carry the identification of the selected PLMN in the RRC connection setup complete message, because the PLMN in the PLMN list stored in each trunking terminal is a red PLMN, the RRC connection setup complete message carries the identification of the red PLMN. In addition, since the bluetooth base station is configured with the RAN Sharing feature, the SIB1 system message sent by the bluetooth base station includes the identifier of the PLMN of the red network and the identifier of the PLMN of the bluetooth network.

And after the core network equipment for transmitting the trunking service is determined to be the red network core network equipment, authenticating the first trunking terminal.

Specifically, after determining that the core network device for transmitting the trunking service is the red network core network device, the blue network base station sends an initial identifier of an initiating terminal carried in an RRC connection establishment request involved in an RRC connection establishment procedure between the first trunking terminal and the blue network base station to the red network core network device, and the red network core network device performs authentication according to the initial identifier of the initiating terminal, and when the authentication is successful, returns a message of successful authentication to the first trunking terminal.

The specific authentication process is a standard process, and is not described in detail in this embodiment.

After the authentication of the first cluster terminal is successful, if the first cluster receiving end is the initiating end of the cluster service, the load of the cluster service is established after the authentication of the first cluster terminal is successful, and after the load of the cluster service is established, the first cluster terminal sends the data packet of the cluster service to the red network core network equipment.

When at least one receiving terminal exists in the cell corresponding to the blue network base station and all the receiving terminals are in the cell corresponding to the blue network, the red network core network equipment sends the data packet of the cluster service to the blue network base station; and the blue network base station sends the data packet of the cluster service to at least one corresponding receiving terminal. The receiving end is a terminal belonging to the same group as the initiating end.

When at least one receiving end exists in a cell corresponding to the blue network base station and at least one receiving end exists in a cell corresponding to the red network base station, the red network core network equipment sends a data packet of the trunking service to the blue network base station and the red network base station; the blue network base station sends the data packet of the cluster service to at least one corresponding receiving terminal; and the red network base station sends the data packet of the cluster service to the corresponding at least one receiving end.

Specifically, the first trunking terminal sends the data packet of the trunking service to other trunking terminals, i.e., receiving terminals, in the same group as the first trunking terminal. The receiving ends may be all in the cell corresponding to the blue-line base station, may also be all in the cell corresponding to the red-line base station, and may also be a part in the cell corresponding to the blue-line base station and another part in the cell corresponding to the red-line base station. The cluster terminal reports the current base station to the red network core network device, the first cluster terminal carries the group identifier after sending the RRC connection setup complete message, and the red network core network device stores the cluster terminals included in each group, so the red network core network device can determine to which base station or base stations the packet of the cluster service should be sent.

Therefore, when at least one receiving terminal exists in the cell corresponding to the blue-line network base station and all the receiving terminals are in the cell corresponding to the blue-line network, the red-line network core network equipment sends the data packet of the trunking service to the blue-line network base station; and the blue network base station sends the data packet of the cluster service to the corresponding at least one receiving end.

As will be understood by those skilled in the art, for other blue-network base stations including a receiving end, the red-network core network device will also send the data packet of the trunking service to these blue-network base stations; and the blue network base stations respectively send the data packets of the trunking service to at least one receiving end corresponding to each blue network base station.

When at least one receiving terminal does not exist in the cell corresponding to the blue-line network base station and all the receiving terminals are in the cell corresponding to the blue-line network, the red-line network core network equipment can send the data packet of the trunking service to other blue-line network base stations comprising the receiving terminals; and the blue network base stations respectively send the data packets of the trunking service to at least one receiving end corresponding to each blue network base station.

As can be understood by those skilled in the art, when a plurality of red network base stations each correspond to at least one receiving end, the red network core network device sends the data packet of the trunking service to the plurality of red network base stations respectively; and the plurality of red network base stations respectively send the data packets of the cluster service to at least one receiving end corresponding to each red network base station. Similarly, in this case, when each of the plurality of blue network base stations corresponds to at least one receiving end, the red network core network device sends the data packet of the trunking service to the plurality of blue network base stations respectively; and the plurality of blue network base stations respectively send the data packets of the trunking service to at least one receiving end corresponding to each blue network base station.

In addition, there are other receiving end distribution modes, the transmission modes of the data packets of the other receiving end distribution modes are not described herein again, the general principle is that each receiving end is in a cell corresponding to which base station, and the red network core network device sends the data packets of the trunking service to which base station after receiving the data of the trunking service sent by the first trunking terminal.

In addition, after the authentication of the first cluster terminal is successful, if the first cluster receiving end is the receiving end of the cluster service, the first cluster performs a process of waiting for paging.

And after the authentication of the first cluster terminal is successful, if the first cluster terminal is a terminal which does not perform the cluster service, the first cluster terminal enters an idle state.

Further, in order to prevent the cluster terminal from performing cell switching between the cell corresponding to the red network and the cell corresponding to the blue network in the process of performing the cluster service, in this embodiment, the neighboring cells configured for each cell corresponding to the red network do not include each cell corresponding to the blue network, and the neighboring cells configured for each cell corresponding to the blue network do not include each cell corresponding to the red network.

In this embodiment, when an access network of a red network fails, a trunking terminal under the failed access network may reside in a cell corresponding to a blue network to continue to perform transceiving of a trunking service, and a blue network base station is configured with a RAN ringing characteristic, and when an originating terminal corresponding to the blue network base station initiates the trunking service, the blue network base station may determine, according to the RAN ringing characteristic and according to a PLMN identifier of the red network carried in an RRC connection establishment completion message, that core network equipment used for transmitting the trunking service is the red network core network equipment, thereby ensuring normal transmission of the trunking service, and improving reliability of trunking service transmission.

The transmission method of the rail transit trunking service of the embodiment includes: when at least one access network of the red network fails, the first cluster terminal reselects the cell and resides in the cell corresponding to the blue network; the first cluster terminal is any terminal under the fault access network; after the first cluster terminal establishes RRC connection with the blue-line network base station, sending an RRC connection establishment completion message to the blue-line network base station, wherein the RRC connection establishment completion message carries a PLMN identification of a red network; the Bluetooth base station is a base station corresponding to a service cell where the first cluster terminal is located; the blue network base station determines core network equipment for transmitting the trunking service as red network core network equipment according to the PLMN identification of the red network; when the first cluster terminal is the initiating end of the cluster service, after the bearer of the cluster service is established, the first cluster terminal sends the data packet of the cluster service to the red network core network equipment; the red network core network equipment sends the data packet to at least one base station where each receiving end is located, and each base station sends the data packet of the cluster service to the corresponding receiving end. The transmission method of the rail transit trunking service of the embodiment improves the reliability of trunking service transmission.

The above embodiment will be described in detail with reference to specific examples.

Fig. 3 is a signaling flow chart of a transmission method of a rail transit trunking service provided by the present invention, as shown in fig. 3, the method of this embodiment may include:

step S201, when at least one access network of the red network fails, the first cluster terminal reselects a cell and resides in the cell corresponding to the blue network; the first cluster terminal is any terminal under the fault access network;

step S202, a first cluster terminal sends a Radio Resource Control (RRC) connection establishment request to a blue-net base station; the Bluetooth base station is a base station corresponding to a service cell where the first cluster terminal is located;

step S203, the blue net base station sends RRC connection configuration information to the first cluster terminal according to the RRC connection establishment request sent by the initiating terminal;

step S204, the first cluster terminal establishes RRC connection with the blue-net base station according to the RRC connection configuration information;

step S205, the first cluster terminal sends an RRC connection establishment completion message to the blue-line base station, wherein the RRC connection establishment completion message carries the PLMN identification of the red network;

step S206, the blue network base station determines the core network equipment for transmitting the trunking service as red network core network equipment according to the PLMN identification of the red network;

when the first trunking terminal is the originating terminal of the trunking service, step S207 to step S213 are executed.

Step S207, after the load of the cluster service is established, the first cluster terminal sends a data packet of the cluster service to the red network core network equipment;

when at least one receiving terminal exists in the cell corresponding to the blue-net base station and all the receiving terminals are in the cell corresponding to the blue-net, executing the steps S208-S209; the receiving end is a terminal belonging to the same group with the initiating end;

step S208, the red network core network equipment sends the data packet of the cluster service to the blue network base station;

step S209, the bluetooth base station sends the data packet of the trunking service to the corresponding at least one receiving end.

When at least one receiving terminal exists in the cell corresponding to the blue-network base station and at least one receiving terminal exists in the cell corresponding to the red-network base station, executing the steps S210-S213;

step S210, the red network core network equipment sends the data packet of the cluster service to the blue network base station;

step S211, the red network core network equipment sends the data packet of the cluster service to a red network base station;

step S212, the blue-net base station sends the data packet of the cluster service to at least one corresponding receiving terminal;

step S213, the red network base station sends the data packet of the trunking service to the corresponding at least one receiving end.

Specifically, when at least one access network of the red network fails, for each failed access network, each first cluster terminal in each cell corresponding to the failed access network cannot continue to access the red network, and each first cluster terminal will reside in a cell corresponding to the blue network with the next highest frequency point through cell reselection, that is, reside in a cell corresponding to the network with the next highest priority frequency point. That is to say, when the access network a of the red network fails, the first trunking terminal in the access network a cannot interact with the base station a in the access network a, and at this time, each first trunking terminal may reselect and reside in the cell corresponding to the blue network through the cell, that is, each first trunking terminal interacts with the base station b in the blue network corresponding to the base station a in the red network. The area covered by the corresponding base station in the blue network and the red network is the same.

A first cluster terminal sends an RRC connection establishment request to a blue network base station; the bluetooth base station is a base station corresponding to a serving cell where the first trunking terminal is located.

The blue network base station receives the RRC connection establishment request sent by the first cluster terminal, and sends RRC connection configuration information to the first cluster terminal according to the RRC connection establishment request sent by the first cluster terminal. The RRC connection establishment request carries an initial identification of the first cluster terminal for authentication;

and the first cluster terminal receives the RRC connection configuration information and establishes RRC connection with the blue network base station according to the RRC connection configuration information.

The first trunking terminal may select, from the PLMN identification list in the SIB1 system message, an identification of a PLMN in the PLMN list stored in the first trunking terminal, and carry the identification of the selected PLMN in the RRC connection setup complete message, because the PLMN in the PLMN list stored in the first trunking terminal is a red PLMN, the RRC connection setup complete message carries the identification of the red PLMN. In addition, since the bluetooth base station is configured with the RAN Sharing feature, the SIB1 system message sent by the bluetooth base station includes the identifier of the PLMN of the red network and the identifier of the PLMN of the bluetooth network.

As for steps S208 to S213, referring to steps S105 to S110 of the embodiment shown in fig. 2, the general principle is that each receiving end is in a cell corresponding to which base station, and after receiving the data of the trunking service sent by the initiating end, the red network core network device sends the data packet of the trunking service to which base station.

After the authentication of the first cluster terminal is successful, if the first cluster receiving end is the receiving end of the cluster service, the first cluster performs a process of waiting for paging.

The transmission method of the rail transit trunking service of the embodiment improves the reliability of trunking service transmission.

In order to use the red network to bear the cluster service as much as possible, and improve the transmission efficiency of the cluster service. This implementation is further improved upon the previous implementation.

Fig. 4 is a signaling flow chart of a transmission method of a rail transit trunking service provided by the present invention, as shown in fig. 4, the method of this embodiment may include:

step S301, when at least one fault access network of the red network is recovered to be normal and a second cluster terminal belongs to the cluster terminal under the access network recovered to be normal, the second cluster terminal performs cell reselection and resides in a cell corresponding to the red network;

step S302, the second cluster terminal sends an RRC connection establishment request to the red network base station; the red network base station is a base station corresponding to a service cell where the first cluster terminal is located;

step S303, the red network base station sends RRC connection configuration information to the second cluster terminal according to the RRC connection establishment request sent by the initiating terminal;

step S304, the second cluster terminal establishes RRC connection with the red network base station according to the RRC connection configuration information;

step S305, the second cluster terminal sends an RRC connection establishment completion message to the red network base station;

and when the second trunking terminal is the initiating terminal of the trunking service, executing step S306 to step S312.

Step S306, after the load of the cluster service is established, the initiating terminal sends the data packet of the cluster service to the red network core network equipment;

when the failed access network is completely recovered and at least one receiving end exists in the cell corresponding to the red network base station, executing the steps S307 to S308; the receiving end is a terminal belonging to the same group with the initiating end;

step S307, the red network core network equipment sends the data packet of the cluster service to the red network base station;

step S308, the red network base station sends the data packet of the trunking service to the corresponding at least one receiving end.

When the failed access network is not completely recovered, at least one receiving terminal exists in the cell corresponding to the blue network base station and at least one receiving terminal exists in the cell corresponding to the red network base station, executing the steps S309-S312;

step S309, the red network core network equipment sends the data packet of the cluster service to the red network base station;

step S310, the red network core network equipment sends the data packet of the cluster service to the blue network base station;

step S311, the red network base station sends the data packet of the cluster service to at least one corresponding receiving terminal;

step S312, the bluetooth base station sends the data packet of the trunking service to the corresponding at least one receiving end.

Specifically, the application scenario of this embodiment is that at least one failed access network of the red network is recovered to be normal.

And when at least one fault access network of the red network is recovered to be normal and the second cluster terminal belongs to the cluster terminal under the access network recovered to be normal, the second cluster terminal performs cell reselection and resides in the cell corresponding to the red network.

Specifically, because the priority of the frequency point of the red network is higher than that of the frequency point of the blue network, when the access network a returns to normal, the second cluster terminal in the access network B corresponding to the access network a in the blue network resides in the cell corresponding to the red network, that is, belongs to the cell corresponding to the access network a again, and interacts with the base station a of the access network a.

After the second cluster terminal resides in a cell corresponding to the red network, the second cluster terminal sends an RRC connection establishment request to a red network base station; the red network base station is a base station corresponding to a service cell where the first cluster terminal is located.

And the red network base station receives the RRC connection establishment request sent by the second trunking terminal and sends RRC connection configuration information to the initiating terminal according to the RRC connection establishment request sent by the second trunking terminal. The RRC connection establishment request carries an initial identification of an initiating terminal for authentication;

and the second cluster terminal receives the RRC connection configuration information and establishes RRC connection with the red network base station according to the RRC connection configuration information.

And after the RRC connection between the second cluster terminal and the red network base station is established, the initiating terminal sends an RRC connection establishment completion message to the red network base station.

And after receiving the RRC connection establishment completion message, the red network base station authenticates the second cluster terminal.

Specifically, after receiving the RRC connection setup complete message, the red network base station sends the initial identifier of the second trunking terminal carried in the RRC connection setup request to the red network core network device, and the red network core network device performs authentication according to the initial identifier of the originating terminal, and when the authentication is successful, returns a message of successful authentication to the second trunking terminal.

After the authentication of the second cluster terminal is successful, if the second cluster receiving end is the initiating end of the cluster service, the load of the cluster service is established after the authentication of the second cluster terminal is successful, and after the load of the cluster service is established, the second cluster terminal sends the data packet of the cluster service to the red network core network equipment.

As for steps S307 to S312, referring to steps S207 to S212 of the embodiment shown in fig. 3, the general principle is that each receiving end is in a cell corresponding to which base station, and after receiving the data of the trunking service sent by the initiating end, the red network core network device sends the data packet of the trunking service to which base station.

After the authentication of the second trunking terminal in this embodiment is successful, if the second trunking receiving end is the trunking service receiving end, the first trunking performs a process of waiting for paging.

After the authentication of the second cluster terminal is successful in this embodiment, if the second cluster terminal is a terminal that does not perform the cluster service, the first cluster terminal enters an idle state.

In this embodiment, when the failed access network of the red network is recovered to be normal, each cluster terminal under the blue-network base station corresponding to the failed access network recovered to be normal resides in a cell corresponding to the red network, and the red network is used as much as possible to carry the cluster service, thereby improving the completion efficiency of the cluster service and the reliability of cluster service transmission.

Fig. 5 is a fourth signaling flowchart of the transmission method of the rail transit trunking service provided by the present invention, as shown in fig. 5, the method of this embodiment may include:

step S401, when each access network of the red network works normally, after a third cluster terminal resides in a cell corresponding to the red network, the third cluster terminal sends a Radio Resource Control (RRC) connection establishment request to a red network base station; the red network base station is a base station corresponding to a service cell where a third cluster terminal is located; the third cluster terminal is any one of the cluster terminals in the rail transit;

step S402, the red network base station sends RRC connection configuration information to the initiating terminal according to the RRC connection establishment request sent by the third cluster terminal; the RRC connection establishment request carries an initial identification of a receiving end;

step S403, the third cluster terminal establishes RRC connection with the red network base station according to the RRC connection configuration information;

step S404, the third cluster terminal sends an RRC connection establishment completion message to the red network base station;

step S405, the red network base station sends the initial identification of the third cluster terminal to the red network core network equipment;

step S406, the red network core network equipment authenticates the third cluster terminal according to the initial identifier of the third cluster terminal to obtain a successful authentication result;

step S407, the red network core network equipment sends a message of successful authentication to the third cluster terminal;

if the third trunking terminal is the originating terminal of the trunking service, steps S408 to S410 are executed.

Step S408, after the bearer for transmitting the cluster service is established, the third cluster terminal sends the data packet of the cluster service to the red network core network equipment;

step S409, when at least one receiving end exists in a cell corresponding to the red network base station, the red network core network equipment sends the data packet of the cluster service to the red network base station; the receiving end is a cluster terminal which belongs to the same group with the initiating end;

step S410, the red network base station sends the data packet of the cluster service to at least one receiving end.

Specifically, the application scenario of this embodiment is that each base station of the red network operates normally.

When the red network base station device works normally, the cluster terminal selects the cell corresponding to the red network for residence, which may be implemented as follows, but is not limited to the following: when the cluster terminal is started up for the first time, the cluster terminal can be randomly accessed to a red network or a blue network, and when the cluster terminal is accessed to the red network and selects a cell corresponding to the red network to reside, the cluster terminal continues to reside in the cell corresponding to the red network according to the priority level of a frequency point of the red network carried in a system message sent by a received red network base station, which is higher than the priority level of the blue network; when a blue network is accessed and a cell corresponding to the blue network is selected to reside, reselecting the cell according to the fact that the priority of the frequency point of the red network carried in the system message sent by the blue network base station is higher than the priority of the blue network, and residing in the cell corresponding to the red network.

The cluster service of the rail transit in this embodiment is carried by a red network carrying a rail transit integrated service, each cluster terminal opens an account on a red network core network device, and the cluster terminal may be a vehicle-mounted communication terminal or a handheld station. Among them, the red net is a mature technology in the prior art, and the present embodiment is not further described in detail.

The transmission methods of the rail transit trunking services corresponding to this embodiment are all methods in the standard, and are not described in detail in this embodiment.

In addition, after the authentication of the third trunking terminal is successful, if the first trunking receiving end is the receiving end of the trunking service, the first trunking performs the process of waiting for paging.

And after the authentication of the third cluster terminal is successful, if the first cluster terminal is a terminal which does not perform the cluster service, the first cluster terminal enters an idle state.

In this embodiment, when each base station in the red network normally works, the red network is used to carry the trunking service, and only when the red network has a faulty access network, it is possible to carry the service through the blue network, thereby improving the completion efficiency of the trunking service and the reliability of the trunking service.

Fig. 6 is a schematic structural diagram of a base station according to a first embodiment of the present invention, and as shown in fig. 6, the apparatus of this embodiment may include: a determining module 11, a receiving module 12 and a sending module 13;

the cluster service is carried by a red network carrying the rail integrated traffic service and a blue network carrying the train control-based CBTC service, the priority of the frequency point of the red network is higher than that of the frequency point of the blue network, and each cluster terminal opens an account on the red network core network equipment.

A determining module 11, configured to determine, when at least one access network of a red network fails and a first trunking terminal resides in a cell corresponding to a blue network, that core network equipment used for transmitting trunking services is red network core network equipment according to a public land mobile network PLMN identifier of the red network, where the PLMN identifier is carried in a radio resource control RRC connection setup complete message sent by the first trunking terminal; the first cluster terminal is a cluster terminal which corresponds to the base station and is under the fault access network;

the receiving module 12 is configured to receive a data packet of the trunking service sent by the red network core network device after a bearer of the trunking service is established when the trunking service needs to be transmitted and at least one receiving end exists in a cell corresponding to the base station.

A sending module 13, configured to send a data packet to a corresponding at least one receiving end.

The receiving module 12 is further configured to receive an RRC connection establishment request sent by the first trunking terminal before determining that the core network device for transmitting the trunking service is the red network core network device according to the PLMN identifier of the red network carried in the RRC connection establishment completion message sent by the first trunking terminal; the RRC connection establishment request comprises an initial identification of an initiating terminal;

the sending module 13 is further configured to send RRC connection configuration information to the initiating terminal according to the RRC connection establishment request, so that the first trunking terminal establishes an RRC connection with the bluetooth base station;

the sending module 13 is further configured to, after determining that the core network device for transmitting the trunking service is the red network core network device according to the PLMN identifier of the red network carried in the RRC connection setup complete message sent by the first trunking terminal, send the initial identifier to the red network core network device, so that the red network core network device sends an authentication success message to the first trunking terminal after successfully authenticating the first trunking terminal according to the initial identifier.

The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.

Fig. 7 is a schematic structural diagram of a first embodiment of a cluster terminal provided in the present invention, and as shown in fig. 7, the apparatus of this embodiment may include: a cell reselection module 21 and a transmission module 22.

The cluster service is carried by a red network carrying the rail integrated traffic service and a blue network carrying the train control-based CBTC service, the priority of the frequency point of the red network is higher than that of the frequency point of the blue network, a cluster terminal is opened on a red network core network device, and the cluster terminal is a cluster terminal under a fault access network when at least one access network of the red network fails.

A cell reselection module 21, configured to reselect a cell and camp to a cell corresponding to the bluetooth network;

a sending module 22, configured to send a radio resource control, RRC, connection setup complete message to a corresponding blue-line network base station, where the RRC connection setup complete message carries an identifier of a PLMN of a red network, so that the blue-line network base station determines, according to the identifier of the PLMN, that core network equipment used for transmitting the trunking service is red-line core network equipment;

the sending module 22 is further configured to send, when the trunking terminal is an originating terminal of the trunking service, a data packet of the trunking service to the red network core network device after the bearer of the trunking service is established, so that after the red network core network device sends the data packet to the blue network base station and/or the red network base station, the blue network base station and/or the red network base station respectively send the data packet to at least one receiving terminal corresponding to each other, where the receiving terminal is a terminal belonging to the same group as the originating terminal.

When at least one failed access network of the red network is recovered to be normal and the cluster terminal is the cluster terminal in the cell corresponding to the failed access network, the cell reselection module 21 is further configured to perform cell reselection and camp on the cell corresponding to the red network.

Fig. 8 is a schematic structural diagram of a second cluster terminal embodiment provided in the present invention, and as shown in fig. 8, the apparatus of this embodiment may further include, on the basis of the apparatus structure shown in fig. 7: a receiving module 23 and an RRC connection establishing module 24;

the sending module 22 is further configured to send an RRC connection setup request to the bluetooth base station before sending an RRC connection setup complete message to the corresponding bluetooth base station; the RRC connection establishment request comprises an initial identifier of the cluster terminal; the receiving module 23 is configured to receive RRC connection configuration information sent by the bluetooth base station according to the RRC connection establishment request;

the RRC connection establishing module 24 is configured to establish an RRC connection with the bluetooth base station according to the RRC connection configuration information.

The receiving module 23 is further configured to receive an authentication success message sent by the red network core network device according to the initial identifier after sending the RRC connection setup complete message to the blue network base station.

Fig. 9 is a schematic structural diagram of an embodiment of a transmission system of a rail transit trunking service provided in the present invention, and as shown in fig. 9, the system of the present embodiment includes: a plurality of base stations 33 and a plurality of trunking terminals 34, where the base station 33 may adopt the structure of the apparatus embodiment in fig. 6, and the trunking terminal 34 may adopt the structure of any one of the apparatus embodiments in fig. 7 or fig. 8.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A transmission method of rail transit cluster service is characterized in that the cluster service is carried by a red network carrying rail integrated traffic service and a blue network carrying CBTC service based on train control, the priority of the frequency point of the red network is higher than that of the frequency point of the blue network, each cluster terminal opens an account on red network core network equipment, the method comprises the following steps:

when at least one access network of the red network fails and a first cluster terminal resides in a cell corresponding to the blue network, a blue network base station corresponding to the first cluster terminal determines core network equipment for transmitting cluster services as the red network core network equipment according to a Public Land Mobile Network (PLMN) identifier of the red network carried in a Radio Resource Control (RRC) connection establishment completion message sent by the first cluster terminal; the first cluster terminal is any terminal under the fault access network of the red network;

when a trunking service needs to be transmitted and at least one receiving end exists in a trunking terminal included in a cell corresponding to the blue network base station, after the bearer of the trunking service is established, the blue network base station receives a data packet of the trunking service sent by the red network core network equipment;

the blue net base station sends the data packet to at least one corresponding receiving end;

before the blue network base station determines, according to the PLMN identifier of the red network carried in the RRC connection setup complete message sent by the first trunking terminal, that the core network device for transmitting trunking services is the red network core network device, the method further includes:

2. The method according to claim 1, wherein the neighboring cells configured for each cell corresponding to the red network do not include each cell corresponding to the blue network, and wherein the neighboring cells configured for each cell corresponding to the blue network do not include each cell corresponding to the red network.

3. A transmission method of rail transit cluster service is characterized in that the cluster service is carried by a red network carrying rail integrated traffic service and a blue network carrying CBTC service based on train control, the priority of the frequency point of the red network is higher than that of the frequency point of the blue network, and each cluster terminal opens an account on red network core network equipment, and the method comprises the following steps:

when the first trunking terminal is an initiating terminal of a trunking service, after the bearer of the trunking service is established, the first trunking terminal sends a data packet of the trunking service to the red network core network device, so that after the red network core network device sends the data packet to the blue network base station and/or the red network base station, the blue network base station and/or the red network base station respectively send the data packet to at least one corresponding receiving terminal, and the receiving terminals are terminals belonging to the same group as the initiating terminal;

before the first trunking terminal sends a radio resource control RRC connection setup complete message to the corresponding bluetooth base station, the method further includes:

4. The method of claim 3, further comprising:

5. The method according to claim 3, wherein the neighboring cells configured for the cells corresponding to the red network do not include the cells corresponding to the blue network, and wherein the neighboring cells configured for the cells corresponding to the blue network do not include the cells corresponding to the red network.

6. A base station is characterized in that cluster services are carried by a red network carrying rail integrated traffic services and a blue network carrying train control-based CBTC services, the priority of the frequency point of the red network is higher than that of the frequency point of the blue network, each cluster terminal opens an account on red network core network equipment, and the base station comprises:

a sending module, configured to send the data packet to a corresponding at least one receiving end;

the receiving module is further configured to receive an RRC connection establishment request sent by the first trunking terminal before determining that core network equipment for transmitting trunking services is the red network core network equipment according to the PLMN identifier of the red network carried in the RRC connection establishment completion message sent by the first trunking terminal; the RRC connection establishment request comprises an initial identifier of the first trunking terminal;

the sending module is further configured to send RRC connection configuration information to the first trunking terminal according to the RRC connection establishment request, so that the first trunking terminal establishes an RRC connection with the bluetooth base station;

the sending module is further configured to send the initial identifier to the red network core network device after determining that the core network device used for transmitting the trunking service is the red network core network device according to the PLMN identifier of the red network carried in the RRC connection setup complete message sent by the first trunking terminal, so that the red network core network device sends an authentication success message to the first trunking terminal after successfully authenticating the first trunking terminal according to the initial identifier.

7. A cluster terminal is characterized in that cluster services are carried through a red network carrying rail integrated traffic services and a blue network carrying train control-based CBTC services, the priority of the frequency point of the red network is higher than that of the frequency point of the blue network, the cluster terminal opens an account on red network core network equipment, and the cluster terminal is a cluster terminal under a fault access network when at least one access network of the red network has a fault, and the cluster terminal comprises:

the sending module is further configured to send, when the trunking terminal is an initiating terminal of a trunking service and after a bearer of the trunking service is established, a data packet of the trunking service to the red network core network device, so that after the red network core network device sends the data packet to the blue network base station and/or the red network base station, the blue network base station and/or the red network base station respectively send the data packet to at least one corresponding receiving terminal, where the receiving terminal is a terminal belonging to the same group as the initiating terminal;

the sending module is further configured to send an RRC connection establishment request to the corresponding bluetooth base station before sending a radio resource control, RRC, connection establishment completion message to the bluetooth base station; the RRC connection establishment request comprises an initial identifier of the cluster terminal;

a receiving module, configured to receive RRC connection configuration information sent by the bluetooth base station according to the RRC connection establishment request;

the RRC connection establishing module is used for establishing RRC connection with the blue network base station according to the RRC connection configuration information;

the receiving module is further configured to receive an authentication success message sent by the red network core network device according to the initial identifier after sending a radio resource control RRC connection setup complete message to the corresponding blue network base station.

8. A transmission system of rail transit trunking service, comprising the base station of claim 6 and the trunking terminal of claim 7.