CN110769471B - Switching and device of broadband trunking communication network and public network - Google Patents
Switching and device of broadband trunking communication network and public network Download PDFInfo
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- CN110769471B CN110769471B CN201810828086.5A CN201810828086A CN110769471B CN 110769471 B CN110769471 B CN 110769471B CN 201810828086 A CN201810828086 A CN 201810828086A CN 110769471 B CN110769471 B CN 110769471B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
Abstract
The invention provides a switching and device of broadband cluster communication network and public network, comprising: the method comprises the steps that a service server of the broadband trunking communication network receives a network switching request sent by terminal equipment, the switching request is used for requesting to be switched from a source network to a target network, when the source network is the broadband trunking communication network, the target network is a public network, when the source network is the public network, the target network is the broadband trunking communication network, the service server caches downlink data which are not sent to the terminal equipment in the source network according to the network switching request, and when the service server learns that switching is completed, the cached downlink data which are not sent to the terminal equipment in the source network are sent to a base station of the target network in a unicast mode, so that data of the terminal equipment are not lost in the switching process, and service continuity is guaranteed.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for switching a broadband Trunking Communication (Btrunc) network and a public network.
Background
The Btrunc network is a Time Division Long Term Evolution (TD-LTE) based "LTE digital transmission + trunking voice communication" private network broadband trunking system standard established by broadband trunking industry alliance organization. The protocol is mainly standardized aiming at the functions of broadband cluster services such as multicast voice service, multicast video service, multicast multimedia service and the like, has the characteristics of flexible bandwidth, high spectrum efficiency, low time delay and high reliability, and can meet the requirements of users on multicast voice service, broadband data, emergency command scheduling and the like.
Terminal devices (also called broadband trunking terminals) in the Btrunc network can be classified into the following two types according to the network channel carried by the terminal devices: (1) terminal equipment which depends on a base station, a core network and a service server in the Btrrun network to carry out service; (2) the existing terminal equipment supports the trunking service through Btrunc network and public network, and each time in the service, the terminal equipment needs to select the network used by the service and perform network switching, and the terminal equipment needs to integrate power consumption, performance, user experience and the like to select the network.
In the prior art, the switching between the Btrunc network and the public network is mainly judged by a terminal according to a downlink signal, and when the downlink signal meets a switching condition, network switching is directly carried out, which can cause data loss of a source network in the switching process.
Disclosure of Invention
The invention provides a switching method and a switching device of a broadband trunking communication network and a public network, which can ensure that data of terminal equipment is not lost in the switching process and ensure the continuity of services.
The first aspect of the present invention provides a method for switching a broadband trunking communication network and a public network, including:
a service server of a broadband trunking communication network receives a network switching request sent by terminal equipment, wherein the switching request is used for requesting to switch from the broadband trunking communication network to a public network;
the service server caches downlink data which are not sent to the terminal equipment in the broadband trunking communication network according to the network switching request;
the service server stops or continues to send the downlink data which is not sent to the terminal equipment in the broadband trunking communication network according to the type of the current service, wherein the type of the current service is a unicast service or a multicast service;
and when the service server learns that the switching is finished, sending the cached downlink data which is not sent to the terminal equipment in the broadband trunking communication network to a base station of the public network in a unicast mode.
Optionally, the stopping or continuing, by the service server, sending downlink data that is not sent to the terminal device in the broadband trunking communication network according to the type of the current service includes:
when the type of the current service is a unicast service, the service server stops sending downlink data which is not sent to the terminal equipment in the broadband trunking communication network;
and when the type of the current service is multicast service, the service server continuously sends downlink data which is not sent to the terminal equipment in the broadband trunking communication network.
Optionally, when the terminal device is switched from the broadband trunking communication network to the public network, the service server sends the cached downlink data that is not sent to the terminal device in the broadband trunking communication network to the base station of the public network in a unicast manner, where the method includes:
the service server receives a notification message sent by the terminal equipment, wherein the notification message is used for notifying the terminal equipment of completion of switching;
and the service server sends the cached downlink data which is not sent to the terminal equipment by the broadband trunking communication network to a base station of the public network in a unicast mode according to the notification message.
The second aspect of the present invention provides a method for switching a broadband trunking communication network and a public network, including:
a service server of a broadband trunking communication network receives a network switching request sent by terminal equipment, wherein the switching request is used for requesting to switch from a public network to the broadband trunking communication network;
the service server stops data transmission according to the network switching request and caches downlink data which are not sent to the terminal equipment in the public network;
and when the service server learns that the switching is completed, sending the cached downlink data which is not sent to the terminal equipment in the public network to a base station of the broadband trunking communication network in a unicast mode.
Optionally, after the service server learns that the handover is completed, the method further includes:
establishing a data channel corresponding to the type of the current service according to the type of the current service, wherein the type of the current service is a unicast service or a multicast service;
and the service server sends the newly received data of the service server to the base station of the broadband trunking communication network through the data channel.
The third aspect of the present invention provides a method for switching a broadband trunking communication network and a public network, including:
when a terminal device is switched from a source network to a target network, the terminal device sends a notification message to a service server of a broadband trunking communication network, wherein the notification message is used for notifying the terminal device of completion of switching, when the source network is the broadband trunking communication network, the target network is a public network, and when the source network is the public network, the target network is the broadband trunking communication network;
and the terminal equipment receives downlink data which is sent to the terminal equipment in the source network and cached by the service server and sent by a base station of the target network.
Optionally, before the terminal device sends the notification message to the service server of the broadband trunking communication network, the method further includes:
the terminal equipment receives the network switching parameters sent by the service server;
the terminal equipment determines that switching conditions are met according to the network switching parameters;
the terminal equipment sends a network switching request to the service server, wherein the network switching request is used for requesting to switch from the source network to the target network;
the terminal equipment receives a network switching response sent by the service server;
and the terminal equipment performs network switching according to the network switching response.
Optionally, the network switching performed by the terminal device according to the network switching response includes:
when the terminal equipment is single modem equipment, the terminal equipment accesses the target network through a network re-accessing process;
and when the terminal equipment is multi-modem equipment, the terminal equipment accesses the target network through a random access process.
The fourth aspect of the present invention provides a method for switching a broadband trunking communication network and a public network, including:
when a terminal device is switched from a source network to a target network, a base station of the target network receives downlink data which is not sent to the terminal device in the source network and sent by a service server of a broadband trunking communication network, wherein when the source network is the broadband trunking communication network, the target network is a public network, and when the source network is the public network, the target network is the broadband trunking communication network;
and the base station of the target network sends downlink data which is not sent to the terminal equipment in the source network to the terminal equipment.
A fifth aspect of the present invention provides a service server, including:
the system comprises a receiving module, a switching module and a switching module, wherein the receiving module is used for receiving a network switching request sent by terminal equipment, and the switching request is used for requesting to switch from a broadband cluster communication network to a public network;
the cache module is used for caching downlink data which is not sent to the terminal equipment in the broadband trunking communication network according to the network switching request;
a sending module, configured to stop or continue sending downlink data that is not sent to the terminal device in the broadband trunking communication network according to a type of a current service, where the type of the current service is a unicast service or a multicast service;
the sending module is further configured to send, in a unicast manner, the cached downlink data that is not sent to the terminal device in the broadband trunking communication network to the base station of the public network when the switching is completed.
Optionally, the sending module is specifically configured to:
when the type of the current service is a unicast service, stopping sending downlink data which is not sent to the terminal equipment in the broadband trunking communication network;
and when the type of the current service is multicast service, continuously sending downlink data which is not sent to the terminal equipment in the broadband trunking communication network.
Optionally, the receiving module is further configured to: receiving a notification message sent by the terminal equipment, wherein the notification message is used for notifying the terminal equipment of completion of switching;
the sending module is specifically configured to: and sending the cached downlink data which is not sent to the terminal equipment by the broadband trunking communication network to a base station of the public network in a unicast mode according to the notification message.
A sixth aspect of the present invention provides a service server, including:
a receiving module, configured to receive a network switching request sent by a terminal device, where the network switching request is used to request to switch from a public network to the broadband trunking communication network;
the sending module is used for stopping data transmission according to the network switching request;
the cache module is used for caching downlink data which is not sent to the terminal equipment in the public network;
the sending module is further configured to send, in a unicast manner, downlink data that is not sent to the terminal device in the public network and cached by the caching module to a base station of the broadband trunking communication network when the service server learns that the handover is completed.
Optionally, the method further includes:
the device comprises an establishing module, a switching module and a sending module, wherein the establishing module is used for establishing a data channel corresponding to the type of the current service according to the type of the current service when the switching is finished, and the type of the current service is a unicast service or a multicast service;
and the sending module is further configured to send the data newly received by the service server to the base station of the broadband trunking communication network through the data channel.
A seventh aspect of the present invention provides a terminal device, including:
a sending module, configured to send a notification message to a service server of a broadband trunking communication network after a terminal device is switched from a source network to a target network, where the notification message is used to notify the terminal device of completion of switching, where the target network is a public network when the source network is the broadband trunking communication network, and the target network is the broadband trunking communication network when the source network is the public network;
and the receiving module is used for receiving downlink data which is sent to the terminal equipment in the source network and cached by the service server and sent by the base station of the target network.
Optionally, the receiving module is further configured to receive a network handover parameter sent by the service server;
the switching module is used for determining that switching conditions are met according to the network switching parameters;
the sending module is further configured to send a network handover request to the service server, where the network handover request is used to request handover from the source network to the target network;
the receiving module is further configured to receive a network switching response sent by the service server;
and the switching module is also used for carrying out network switching according to the network switching response.
Optionally, the switching module is specifically configured to:
when the terminal equipment is single modem equipment, accessing the target network through a network re-accessing process;
and when the terminal equipment is multi-modem equipment, accessing the target network through a random access process.
An eighth aspect of the present invention provides a base station, including:
the terminal device comprises a receiving module, a sending module and a receiving module, wherein the receiving module is used for receiving downlink data which is not sent to the terminal device in a source network and sent by a service server of a broadband trunking communication network after the terminal device is switched from the source network to a target network, the target network is a public network when the source network is the broadband trunking communication network, and the target network is the broadband trunking communication network when the source network is the public network;
and the sending module is used for sending the downlink data which is not sent to the terminal equipment in the source network to the terminal equipment.
A ninth aspect of the present invention provides a service server comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the service server to perform the method according to the first or second aspect of the present invention.
A tenth aspect of the present invention provides a terminal device comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the terminal device to perform the method according to the third aspect of the present invention.
An eleventh aspect of the present invention provides a base station comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the base station to perform the method according to the fourth aspect of the present invention.
A twelfth aspect of the invention provides a computer readable storage medium having stored thereon instructions that, when executed, cause a computer to perform a method according to the first or second aspect of the invention.
A thirteenth aspect of the present invention provides a computer readable storage medium having stored thereon instructions which, when executed, cause a computer to perform the method according to the third aspect of the present invention.
A fourteenth aspect of the present invention provides a computer-readable storage medium having stored thereon instructions that, when executed, cause a computer to perform the method as claimed in the fourth aspect of the present invention.
The invention provides a switching and device of broadband cluster communication network and public network, comprising: the method comprises the steps that a service server of the broadband trunking communication network receives a network switching request sent by terminal equipment, the switching request is used for requesting to be switched from a source network to a target network, when the source network is the broadband trunking communication network, the target network is a public network, when the source network is the public network, the target network is the broadband trunking communication network, the service server caches downlink data which are not sent to the terminal equipment in the source network according to the network switching request, and when the service server learns that switching is completed, the cached downlink data which are not sent to the terminal equipment in the source network are sent to a base station of the target network, so that data of the terminal equipment are not lost in the switching process, and service continuity is guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart of a handover method between a broadband trunking communication network and a public network according to an embodiment of the present invention;
fig. 2 is a signaling flowchart of a switching method between a broadband trunking communication network and a public network according to a second embodiment of the present invention;
fig. 3 is a flowchart of a method for switching between a broadband trunking communication network and a public network according to a third embodiment of the present invention;
fig. 4 is a signaling flowchart of a switching method between a broadband trunking communication network and a public network according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a service server according to a fifth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a service server according to a sixth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal device according to a seventh embodiment of the present invention;
fig. 8 is a schematic structural diagram of a base station according to an eighth embodiment of the present invention;
fig. 9 is a schematic structural diagram of a service server according to a ninth embodiment of the present invention.
With the above figures, certain embodiments of the invention have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.
Fig. 1 is a flowchart of a method for switching between a broadband trunking communication network and a public network according to an embodiment of the present invention, where the method is described in the present embodiment from the perspective of a service server of the broadband trunking communication network, and as shown in fig. 1, the method of the present embodiment includes the following steps:
step S101, a service server of the broadband trunking communication network receives a network switching request sent by a terminal device, wherein the switching request is used for requesting to switch from the broadband trunking communication network to a public network.
The public network may be a Global System for Mobile communications (GSM) network, a Code Division Multiple Access (CDMA) network, a Wideband Code Division Multiple Access (WCDMA) network, a Long Term Evolution (LTE) network, a fifth Generation Mobile communication (5Generation, 5G) network, or a WIFI network.
The service server is configured to process an application layer service of the terminal device, and when the terminal device accesses or switches to the broadband trunking communication network, the service server sends the network switching parameter to the terminal device through a message, where the message may be an application layer message, for example, a Session Initiation Protocol (SIP) message. The message may also be an S1 message or a Radio Resource Control (RRC) message, the S1 message is a message sent through an S1 interface, and the S1 interface is a communication interface between an Evolved NodeB (eNB) of the LTE network and an Evolved Packet Core (EPC).
The network handover parameters may include the following parameters:
(a) and the measurement threshold MeaSethresh is set after the public and private network is switched, the value range is (-140, -100), the unit dbm is set, and the recommended value is-120.
(b) And measuring hysteresis MeaSeHys after switching of the public and private networks, wherein the value range is (0, 15), the unit db and the suggested value is 2 db.
(c) And switching delay Hys of the public and private networks, a value range (0, 15), a unit db and a suggested value 2 db.
(d) And switching the frequency offset Ofn of the service cell by the public and private network.
(e) And switching the serving cell specific bias Ocn by the public and private network.
(f) And switching the frequency offset Ofs of the adjacent area by the public and private network.
(g) And the specific bias Ocs of the adjacent areas of the public and private network switching.
(h) The switching threshold Thresh of the public and private network, the value range (-140, -100), the unit dbm and the recommended value-120.
And the terminal equipment respectively measures the frequency point signal quality of the broadband trunking communication network and the public network in real time according to the network switching parameters configured by the service server, if the signal quality meets the switching condition, network switching is initiated, and the terminal equipment sends a network switching request to the broadband trunking communication network. Optionally, the switching condition is as follows:
mn + Ofn + Ocn-Hys > Thresh, and Ms + Ofs + Ocs-Hys < Thresh (like A4 event)
Where Mn is Reference Signal Receiving Power (RSRP) of a neighboring cell of the terminal device, and Ms is RSRP of a serving cell of the terminal device.
The terminal device may carry the network handover request through an application layer message (such as a SIP message), or may carry the network handover request through an S1 or an RRC message. If the terminal device is receiving the group service, the network switching request also needs to carry the group ID.
Step S102, the service server caches downlink data which are not sent to the terminal device in the broadband trunking communication network according to the network switching request.
After receiving the network switching request, the service server learns that the terminal device needs to be switched to the public network, and then caches downlink data which is not sent to the terminal device in the broadband trunking communication network. The downlink data cached by the service server refers to data which is received before the network switching request is received but is not sent to the terminal device.
Step S103, the service server stops or continues to send the downlink data that is not sent to the terminal device in the broadband trunking communication network according to the type of the current service, where the type of the current service is a unicast service or a multicast service.
The service in the broadband trunking communication network comprises two service types: unicast traffic and multicast traffic, multicast is also known as multicast. The unicast mode is as follows: the host computer has one-to-one communication mode, and the switches and routers in the network only forward data without copying. If 10 clients need the same data, the server needs to transmit one by one, repeating the same work 10 times. Routers and switches in the network select transmission paths according to their destination addresses, and transmit IP unicast data to their designated destinations. The multicast mode is as follows: the one-to-one group communication mode between the hosts means that the hosts joining the same group can receive all the data in the group, and the switches and routers in the network only copy and forward the data required by the hosts to the demander. The data in the group is transmitted to the hosts which join the group, so that the data can be transmitted to a plurality of hosts which need (join the group) at one time, and other communication which does not need (do not join the group) is not influenced.
When the terminal device needs to be switched to the public network from the broadband trunking communication network, if the type of the current service is the unicast service, the service server stops sending the downlink data which is not sent to the terminal device in the broadband trunking communication network to the terminal device when caching the downlink data which is not sent to the terminal device in the broadband trunking communication network. This is because, for the unicast service, even if the service server continues to transmit the downlink data to the terminal device during the handover, the terminal device cannot receive the downlink data.
If the type of the current service is a multicast service, the service server continues to send the downlink data which is not sent to the terminal device in the broadband trunking communication network when caching the downlink data which is not sent to the terminal device in the broadband trunking communication network, the multicast service needs to be sent to a plurality of devices in the group, and at this time, other terminal devices in the group can still normally receive the downlink data.
And step S104, when the service server knows that the switching is completed, sending the cached downlink data which is not sent to the terminal equipment in the broadband trunking communication network to a base station of the public network in a unicast mode.
The method comprises the steps that after the terminal equipment is switched to a public network from a broadband cluster communication network, a notification message is sent to a service server, the notification message is used for notifying the completion of the switching of the terminal equipment, and the terminal equipment sends the notification message to the service server through the public network.
And the service server acquires that the terminal equipment is switched from the broadband trunking communication network to the public network according to the notification message, and sends the cached downlink data which is not sent to the terminal equipment by the broadband trunking communication network to the base station of the public network in a unicast mode. And the base station of the public network sends the downlink data which is cached by the service server and is not sent to the terminal equipment by the broadband trunking communication network to the terminal equipment, so that the data can not be lost in the switching process of the terminal equipment.
The service server not only sends the downlink data which is not sent to the terminal equipment in the cached broadband trunking communication network to the base station of the public network, but also sends the newly received data to the base station of the public network, wherein the newly received data refers to the downlink data which is received by the service server after receiving the network switching request and needs to be sent to the terminal equipment, and the base station of the public network sends the newly received data to the terminal equipment.
In this embodiment, a service server of a broadband trunking communication network receives a network switching request sent by a terminal device, where the switching request is used to request switching from the broadband trunking communication network to a public network, the service server caches downlink data that is not sent to the terminal device in the broadband trunking communication network according to the network switching request, and stops or continues sending the downlink data that is not sent to the terminal device in the broadband trunking communication network according to the type of a current service, and after the switching is completed, the service server sends the cached downlink data that is not sent to the terminal device in the broadband trunking communication network to a base station of the public network in a unicast manner. Therefore, data can not be lost in the switching process of the terminal equipment.
Fig. 2 is a signaling flowchart of a method for switching a broadband trunking communication network and a public network according to a second embodiment of the present invention, where this embodiment describes the method according to the first embodiment in detail, and as shown in fig. 2, the method according to this embodiment includes the following steps:
step S201, the service server sends a network switching parameter to the terminal device.
The service server may send the network switching parameter to the terminal device when the terminal device accesses or switches to the broadband trunking communication network, and the specific information and carrying manner of the network switching parameter refer to the description related to the first embodiment, which is not described herein again.
Step S202, the terminal device detects the signal quality of the public network and the broadband trunking communication network and judges whether the switching condition is met.
And the terminal equipment respectively measures the signal quality of the broadband trunking communication network and the public network in real time according to the network switching parameters, if the signal quality meets the switching condition, the step S203 is executed, and if the signal quality does not meet the switching condition, the signal quality is continuously detected. The switching condition refers to the description of the first embodiment, and is not described herein again.
Step S203, the terminal device sends a network switching request to the service server.
The terminal equipment sends a network switching request to the service server through a base station and a core network of the broadband trunking communication network, and the network switching request is used for requesting to switch from the broadband trunking communication network to the public network. The terminal device may carry the network handover request through an application layer message (such as a SIP message), or may carry the network handover request through an S1 or an RRC message. If the terminal device is receiving the group service, the network switching request also needs to carry the group ID.
Step S204, if the type of the current service is a unicast service, the service server stops sending data to the terminal equipment and caches downlink data which are not sent to the terminal equipment in the broadband trunking communication network, and if the type of the current service is a multicast service, the service server continues sending data and caches the downlink data which are not sent to the terminal equipment in the broadband trunking communication network.
Step S205, the service server sends a network switching response to the terminal device.
The network switching response is used for informing the terminal equipment that the network switching is allowed.
And step S206, the terminal equipment performs switching from the broadband trunking communication network to the public network.
And step S207, the terminal equipment accesses to a public network.
When the terminal equipment is single MODEN (modem) equipment, the terminal equipment accesses the public network through a network re-access process, and when the terminal equipment is multi-MODEN equipment, the terminal equipment accesses the public network through a random access process. The process of accessing the public network by the terminal device is interactively completed with the base station and the core network of the broadband trunking communication network and the base station and the core network of the public network, and the specific access process can refer to the existing standard flow and is not repeated here. The single mode terminal device can only measure the signal quality of one network, and therefore, when accessing the public network, the single mode terminal device needs to access the network through a network re-accessing process. The multi-MODEN terminal equipment can measure the signal quality of the two networks simultaneously, so that the multi-MODEN terminal equipment can be accessed to the public network through a random access process when the multi-MODEN terminal equipment is accessed to the public network.
And step S208, the terminal equipment sends a notification message to the base station of the public network.
The notification message is used to notify the terminal device that the handover is completed, and may be a handover complete message.
Step S209, the base station of the public network sends a notification message to the service server.
Step S210, the service server sends the cached downlink data that is not sent to the terminal device in the broadband trunking communication network to the base station of the public network in a unicast manner.
Step S211, the base station of the public network sends the downlink data, which is cached by the service server and not sent to the terminal device in the broadband trunking communication network, to the terminal device.
In this embodiment, the service server of the broadband trunking communication network caches downlink data that is not sent to the terminal device in the broadband trunking communication network during the switching process, and sends the downlink data that is not sent to the terminal device in the broadband trunking communication network to the terminal device through the switched public network after the switching is completed, so as to ensure the continuity of the service of the terminal device during the network switching process.
Fig. 3 is a flowchart of a method for switching between a broadband trunking communication network and a public network according to a third embodiment of the present invention, where a difference between this embodiment and the first embodiment is that a terminal device in this embodiment is switched from the public network to the broadband trunking communication network, and as shown in fig. 3, the method provided in this embodiment includes the following steps:
step S301, a service server of the broadband trunking communication network receives a network switching request sent by the terminal device, and the switching request is used for requesting to switch from the public network to the broadband trunking communication network.
Step S302, the service server stops data transmission according to the network switching request and caches downlink data which are not sent to the terminal equipment in the public network.
After receiving the network switching request, the service server learns that the terminal device needs to be switched from the public network to the broadband trunking communication network, and stops data transmission and caches downlink data which are not sent to the terminal device in the public network. The downlink data cached by the service server refers to data which is received before the network switching request is received but is not sent to the terminal device.
Step S303, when the service server knows that the switching is completed, sending the cached downlink data that is not sent to the terminal device in the public network to the base station of the broadband trunking communication network in a unicast manner.
The base station of the broadband trunking communication network sends the downlink data which is not sent to the terminal equipment in the public network to the equipment, so that the data loss of the terminal equipment in the network switching process can be avoided, and the continuity of the service is ensured.
Optionally, after learning that the switching is completed, the service server establishes a data channel corresponding to the type of the current service according to the type of the current service, where the type of the current service is a unicast service or a multicast service, and sends data newly received by the service server to the base station of the broadband trunking communication network through the data channel.
The service server learns that the handover is completed, specifically: after the terminal equipment is switched, sending a notification message to the service server through the switched broadband trunking communication network, wherein the notification message is used for notifying the completion of the switching of the terminal equipment, and the service server receives the notification message sent by the terminal equipment and learns that the terminal equipment is switched from the public network to the broadband trunking communication network according to the notification message.
When the type of the current service is a unicast service, the service server establishes a unicast channel; and when the type of the current service is multicast service, the service server establishes a multicast channel. And when the type of the current service is the unicast service, the service server sends the newly received data of the service server to a base station of the broadband trunking communication network through the established unicast channel. And when the type of the current service is multicast service, the service server sends the newly received data of the service server to a base station of the broadband trunking communication network through the established multicast channel.
In this embodiment, a service server of a broadband trunking communication network receives a network switching request sent by a terminal device, where the switching request is used to request switching from a public network to the broadband trunking communication network, and the service server caches downlink data that is not sent to the terminal device in the public network according to the network switching request, and sends the cached downlink data that is not sent to the terminal device in the public network to a base station of the broadband trunking communication network in a unicast manner when the service server knows that switching is completed, thereby avoiding data loss of the terminal device during network switching.
Fig. 4 is a signaling flowchart of a method for switching a broadband trunking communication network and a public network according to a fourth embodiment of the present invention, where this embodiment describes the method according to a third embodiment in detail, and as shown in fig. 4, the method according to this embodiment includes the following steps:
step S401, the service server sends the network switching parameter to the terminal device.
The service server may send the network switching parameter to the terminal device when the terminal device accesses or switches to the broadband trunking communication network, and the specific information and carrying manner of the network switching parameter refer to the description related to the first embodiment, which is not described herein again.
Step S402, detecting the signal quality of the public network and the broadband trunking communication network, and judging whether the switching condition is met.
And the terminal equipment respectively measures the signal quality of the broadband trunking communication network and the public network in real time according to the network switching parameters, if the signal quality meets the switching condition, the step S403 is executed, and if the signal quality does not meet the switching condition, the signal quality is continuously detected. The switching condition refers to the description of the first embodiment, and is not described herein again.
Step S403, the terminal device sends a network switching request to the service server.
The terminal equipment sends a network switching request to the service server through a base station and a core network of the public network, and the network switching request is used for requesting to switch from the public network to the broadband trunking communication network. The terminal device may carry the network handover request through an application layer message (such as a SIP message), or may carry the network handover request through an S1 or an RRC message. If the terminal device is receiving the group service, the network switching request also needs to carry the group ID.
Step S404, the service server stops data transmission and caches downlink data which are not sent to the terminal equipment in the public network.
Step S405, the service server sends a network switching response to the terminal equipment.
The network switching response is used for informing the terminal equipment that the network switching is allowed.
And step S406, the terminal equipment performs switching from the public network to the broadband trunking communication network.
Step S407, the terminal device accesses the broadband trunking communication network.
When the terminal equipment is single MODEN equipment, the terminal equipment is accessed to the broadband trunking communication network through a network re-accessing process, and when the terminal equipment is multi-MODEN equipment, the terminal equipment is accessed to the broadband trunking communication network through a random access process. The process of accessing the broadband trunking communication network by the terminal device is interactively completed with the base station and the core network of the broadband trunking communication network and the base station and the core network of the public network, and the specific access process can refer to the existing standard flow and is not described herein again.
Step S408, the terminal device sends a notification message to the base station of the broadband trunking communication network.
The notification message is used to notify that the handover is complete.
Step S409, the base station of the broadband trunking communication network sends a notification message to the service server.
Step S410, the service server establishes a data channel corresponding to the type of the current service according to the type of the current service.
The service server may set up a data channel corresponding to the type of the current service by itself after receiving the notification message, or the terminal device may indicate the service server to set up the data channel corresponding to the type of the current service by carrying the indication information in the notification message. Alternatively, the indication message may be sent by a separate message.
Step S411, the service server sends the newly received data to the base station of the broadband trunking communication network through the established data channel.
Step S412, the service server sends the cached downlink data that is not sent to the terminal device in the public network to the base station of the broadband trunking communication network in a unicast manner.
Step S413, the base station of the broadband trunking communication network sends, to the terminal device, the downlink data that is not sent to the terminal device in the public network cached by the service server and the data newly received by the service server.
In this embodiment, the service server of the broadband trunking communication network caches downlink data that is not sent to the terminal device in the broadband trunking communication network during the switching process, and sends the downlink data that is not sent to the terminal device in the broadband trunking communication network to the terminal device through the switched broadband trunking communication network after the switching is completed, so as to ensure the continuity of the service of the terminal device during the network switching process.
Fig. 5 is a schematic structural diagram of a service server according to a fifth embodiment of the present invention, and as shown in fig. 5, the service server according to this embodiment includes:
a receiving module 11, configured to receive a network switching request sent by a terminal device, where the network switching request is used to request to switch from a broadband trunking communication network to a public network;
a caching module 12, configured to cache, according to the network switching request, downlink data that is not sent to the terminal device in the broadband trunking communication network;
a sending module 13, configured to stop or continue sending downlink data that is not sent to the terminal device in the broadband trunking communication network according to a type of a current service, where the type of the current service is a unicast service or a multicast service;
the sending module 13 is further configured to send, in a unicast manner, the cached downlink data that is not sent to the terminal device in the broadband trunking communication network to the base station of the public network when the switching is completed.
Optionally, the sending module 13 is specifically configured to:
when the type of the current service is a unicast service, stopping sending downlink data which is not sent to the terminal equipment in the broadband trunking communication network;
and when the type of the current service is multicast service, continuously sending downlink data which is not sent to the terminal equipment in the broadband trunking communication network.
Optionally, the receiving module 11 is further configured to: receiving a notification message sent by the terminal equipment, wherein the notification message is used for notifying the terminal equipment of completion of switching;
the sending module 13 is specifically configured to: and sending the cached downlink data which is not sent to the terminal equipment by the broadband trunking communication network to a base station of the public network in a unicast mode according to the notification message.
The service server provided in this embodiment may be used to execute the method steps executed by the service server in the first embodiment and the second embodiment, and the specific implementation manner and the technical effect are similar, which are not described herein again.
Fig. 6 is a schematic structural diagram of a service server according to a sixth embodiment of the present invention, and as shown in fig. 6, the service server according to this embodiment includes:
a receiving module 21, configured to receive a network switching request sent by a terminal device, where the network switching request is used to request to switch from a public network to the broadband trunking communication network;
the sending module 22 is configured to stop data transmission according to the network switching request;
a caching module 23, configured to cache downlink data that is not sent to the terminal device in the public network;
the sending module 22 is further configured to send, in a unicast manner, the downlink data that is not sent to the terminal device in the public network and cached by the caching module 23 to the base station of the broadband trunking communication network when the service server learns that the handover is completed.
Optionally, the method further includes:
the establishing module 24 is configured to, when the switching is completed, establish a data channel corresponding to the type of the current service according to the type of the current service, where the type of the current service is a unicast service or a multicast service;
the sending module 22 is further configured to send data newly received by the service server to the base station of the broadband trunking communication network through the data channel.
The service server provided in this embodiment may be configured to execute the method steps executed by the service server in the third embodiment and the fourth embodiment, and the specific implementation manner and the technical effect are similar, and are not described herein again.
Fig. 7 is a schematic structural diagram of a terminal device according to a seventh embodiment of the present invention, and as shown in fig. 7, the terminal device according to the present embodiment includes:
a sending module 31, configured to send a notification message to a service server of a broadband trunking communication network after a terminal device is switched from a source network to a target network, where the notification message is used to notify the terminal device of completion of switching, where the target network is a public network when the source network is the broadband trunking communication network, and the target network is the broadband trunking communication network when the source network is the public network;
a receiving module 32, configured to receive downlink data that is not sent to the terminal device in the source network and cached by the service server and sent by the base station of the target network.
Optionally, the receiving module 32 is further configured to receive a network handover parameter sent by the service server;
a switching module 33, configured to determine that a switching condition is satisfied according to the network switching parameter;
the sending module 31 is further configured to send a network handover request to the service server, where the network handover request is used to request handover from the source network to the target network;
the receiving module 32 is further configured to receive a network switching response sent by the service server;
the switching module 33 is further configured to perform network switching according to the network switching response.
Optionally, the switching module 33 is specifically configured to:
when the terminal equipment is single modem equipment, accessing the target network through a network re-accessing process;
and when the terminal equipment is multi-modem equipment, accessing the target network through a random access process.
The terminal device provided in this embodiment may be configured to execute the method steps executed by the terminal device in the first to fourth embodiments, and the specific implementation manner and the technical effect are similar, which are not described herein again.
Fig. 8 is a schematic structural diagram of a base station according to an eighth embodiment of the present invention, and as shown in fig. 8, the base station according to the present embodiment includes:
a receiving module 41, configured to receive downlink data that is not sent to a terminal device in a source network and sent by a service server of a broadband trunking communication network after a terminal device is switched from the source network to a target network, where the target network is a public network when the source network is the broadband trunking communication network, and the target network is the broadband trunking communication network when the source network is the public network;
a sending module 42, configured to send, to the terminal device, downlink data that is not sent to the terminal device in the source network.
The base station provided in this embodiment may be configured to execute the method steps executed by the base station of the network after the handover in the first to fourth embodiments, and specific implementation manners and technical effects are similar and are not described herein again.
Fig. 9 is a schematic structural diagram of a service server according to a ninth embodiment of the present invention, and as shown in fig. 9, the service server according to this embodiment includes a processor 51, a memory 52, and a transceiver 53, where the memory 52 is used to store instructions, the transceiver 53 is used to communicate with other devices, and the processor 51 is used to execute the instructions stored in the memory 52, so that the service server executes the method steps executed by the service server according to the first to fourth embodiments of the present invention, and specific implementation manners and technical effects are similar, and are not described again here.
An embodiment of the present invention provides a terminal device, where the terminal device includes a processor, a memory, and a transceiver, the memory is used to store an instruction, the transceiver is used to communicate with other devices, and the processor is used to execute the instruction stored in the memory, so that the terminal device executes the method steps executed by the terminal device in the first to fourth embodiments of the present invention, and specific implementation manners and technical effects are similar, and are not described herein again. The structure of the terminal device can be shown in fig. 9.
An eleventh embodiment of the present invention provides a base station, including a processor, a memory, and a transceiver, where the memory is configured to store an instruction, the transceiver is configured to communicate with other devices, and the processor is configured to execute the instruction stored in the memory, so that the base station executes the method steps executed by the base station of the network after the handover in the first to fourth embodiments. The structure of the base station can be shown in fig. 9.
A twelfth embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the instructions are executed, the instructions enable a computer to execute the method steps executed by the service server in the first to fourth embodiments of the present invention, and specific implementation manners and technical effects are similar, and are not described herein again.
A thirteenth embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the instructions are executed, the instructions enable a computer to execute the method steps executed by the terminal device in the first to fourth embodiments of the present invention, and specific implementation manners and technical effects are similar, and are not described herein again.
A fourteenth embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores instructions, and when the instructions are executed, the instructions cause a computer to execute the method steps performed by the base station of the network after handover in the first to fourth embodiments, and specific implementation and technical effects are similar, and are not described herein again.
The terminal device involved in the above embodiment may be: the mobile phone and the computer may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a smart phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a computer, a laptop computer, a handheld communication device, a handheld computing device, a satellite wireless device, a wireless modem card, a Set Top Box (STB), a vehicle-mounted device, a wearable device, a smart home device, other devices for communicating on a wireless system, and the like.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (13)
1. A method for switching a broadband trunking communication network and a public network is characterized by comprising the following steps:
a service server of a broadband trunking communication network receives a network switching request sent by terminal equipment, wherein the switching request is used for requesting to switch from the broadband trunking communication network to a public network;
the service server caches downlink data which are not sent to the terminal equipment in the broadband trunking communication network according to the network switching request;
the service server stops or continues to send the downlink data which is not sent to the terminal equipment in the broadband trunking communication network according to the type of the current service, wherein the type of the current service is a unicast service or a multicast service;
after the terminal device is switched from the broadband trunking communication network to the public network, the service server receives a notification message sent by the terminal device, wherein the notification message is used for notifying the terminal device of completion of switching;
the service server sends the cached downlink data which is not sent to the terminal equipment by the broadband trunking communication network to a base station of the public network in a unicast mode according to the notification message;
the service server stops or continues to send the downlink data which is not sent to the terminal device in the broadband trunking communication network according to the type of the current service, and the method comprises the following steps:
when the type of the current service is a unicast service, the service server stops sending downlink data which is not sent to the terminal equipment in the broadband trunking communication network;
and when the type of the current service is multicast service, the service server continuously sends downlink data which is not sent to the terminal equipment in the broadband trunking communication network.
2. A method for switching a broadband trunking communication network and a public network is characterized by comprising the following steps:
a service server of a broadband trunking communication network receives a network switching request sent by terminal equipment, wherein the switching request is used for requesting to switch from a public network to the broadband trunking communication network;
the service server stops data transmission according to the network switching request and caches downlink data which are not sent to the terminal equipment in the public network;
after the terminal equipment is switched to the broadband trunking communication network from the public network, the service server receives a notification message sent by the terminal equipment, wherein the notification message is used for notifying the terminal equipment of completion of switching;
and the service server sends the cached downlink data which is not sent to the terminal equipment in the public network to a base station of the broadband trunking communication network in a unicast mode according to the notification message.
3. The method of claim 2, wherein after the service server learns that the handover is completed, the method further comprises:
establishing a data channel corresponding to the type of the current service according to the type of the current service, wherein the type of the current service is a unicast service or a multicast service;
and the service server sends the newly received data of the service server to the base station of the broadband trunking communication network through the data channel.
4. A method for switching a broadband trunking communication network and a public network is characterized by comprising the following steps:
the method comprises the steps that terminal equipment sends a network switching request to a service server of a broadband trunking communication network, so that the service server caches downlink data which are not sent to the terminal equipment in a source network according to the network switching request, and the network switching request is used for requesting to be switched from the source network to a target network; when the source network is the broadband trunking communication network, the target network is a public network, and when the source network is the public network, the target network is the broadband trunking communication network;
when the network switching request is used for requesting to switch from the broadband trunking communication network to a public network, the service server stops or continues to send downlink data which is not sent to the terminal equipment in the broadband trunking communication network according to the type of the current service;
when the type of the current service is a unicast service, the service server stops sending downlink data which is not sent to the terminal equipment in the broadband trunking communication network;
when the type of the current service is multicast service, the service server continuously sends downlink data which is not sent to the terminal equipment in the broadband trunking communication network;
after terminal equipment is switched from a source network to a target network, the terminal equipment sends a notification message to a service server of a broadband trunking communication network so that the service server sends cached downlink data which is not sent to the terminal equipment in the source network to a base station of the target network in a unicast mode, wherein the notification message is used for notifying the terminal equipment of completion of switching; and the terminal equipment receives downlink data which is sent to the terminal equipment in the source network and cached by the service server and sent by a base station of the target network.
5. The method of claim 4, wherein before the terminal device sends the notification message to the service server of the broadband trunking communication network, the method further comprises:
the terminal equipment receives the network switching parameters sent by the service server;
the terminal equipment determines that switching conditions are met according to the network switching parameters;
the terminal equipment sends a network switching request to the service server, wherein the network switching request is used for requesting to switch from the source network to the target network;
the terminal equipment receives a network switching response sent by the service server;
and the terminal equipment performs network switching according to the network switching response.
6. The method of claim 5, wherein the network handover performed by the terminal device according to the network handover response comprises:
when the terminal equipment is single modem equipment, the terminal equipment accesses the target network through a network re-accessing process;
and when the terminal equipment is multi-modem equipment, the terminal equipment accesses the target network through a random access process.
7. A switching method of broadband trunking communication network and public network, characterized by, apply to the base transceiver station of the target network; the method comprises the following steps:
after a terminal device sends a network switching request to a service server of a broadband trunking communication network, the service server caches downlink data which is not sent to the terminal device in the broadband trunking communication network according to the network switching request;
when the network switching request is used for requesting to switch from the broadband trunking communication network to a public network, the service server stops or continues to send downlink data which is not sent to the terminal equipment in the broadband trunking communication network according to the type of the current service;
when the type of the current service is a unicast service, the service server stops sending downlink data which is not sent to the terminal equipment in the broadband trunking communication network;
when the type of the current service is multicast service, the service server continuously sends downlink data which is not sent to the terminal equipment in the broadband trunking communication network;
when a terminal device is switched from a source network to a target network, a base station of the target network receives downlink data which is not sent to the terminal device in the source network and sent by a service server of a broadband trunking communication network, wherein when the source network is the broadband trunking communication network, the target network is a public network, and when the source network is the public network, the target network is the broadband trunking communication network; after receiving a notification message sent by the terminal device to indicate completion of switching, the service server sends cached downlink data which is not sent to the terminal device in the source network to a base station in the target network in a unicast mode;
and the base station of the target network sends downlink data which is not sent to the terminal equipment in the source network to the terminal equipment.
8. A service server comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the service server to perform the method of any one of claims 1-3.
9. A terminal device comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the terminal device to perform the method of any one of claims 4-6.
10. A base station comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the base station to perform the method of claim 7.
11. A computer-readable storage medium having instructions stored thereon that, when executed, cause a computer to perform the method of any of claims 1-3.
12. A computer-readable storage medium having instructions stored thereon that, when executed, cause a computer to perform the method of any of claims 4-6.
13. A computer-readable storage medium having instructions stored thereon that, when executed, cause a computer to perform the method of claim 7.
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| CN113543246B (en) * | 2020-04-21 | 2023-11-21 | 成都鼎桥通信技术有限公司 | Network switching method and device |
| CN113825195A (en) * | 2020-06-19 | 2021-12-21 | 成都鼎桥通信技术有限公司 | Service processing method, device and mobile terminal |
| CN111741439A (en) * | 2020-06-22 | 2020-10-02 | 河北远东通信系统工程有限公司 | Cluster multicast switching method of B-trunk system |
| CN114390609A (en) * | 2020-10-22 | 2022-04-22 | 展讯通信（上海）有限公司 | Data transmission method, device and equipment |
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