CN104883217A

CN104883217A - Method, system and device of transmitting satellite messages

Info

Publication number: CN104883217A
Application number: CN201410073389.2A
Authority: CN
Inventors: 全海洋; 周燕飞
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2014-02-28
Filing date: 2014-02-28
Publication date: 2015-09-02
Anticipated expiration: 2034-02-28
Also published as: CN104883217B; WO2015127881A1

Abstract

The embodiment of the invention relates to the wireless communication technical field, in particular a method, system and device of transmitting satellite messages used for receiving short messages when a terminal can not receive satellite signals. The method comprises: checking a satellite signal receiving state of a terminal by a satellite server when a satellite message is required to be sent to the terminal; and sending the satellite message to the terminal through a wireless mobile communication network when the satellite server determines that satellite transmission is unavailable according to the satellite signal receiving state of the terminal. According to the embodiment of the invention, a satellite message can be sent to a terminal through a mobile communication network so as to improve system performance; further, a satellite message sending mode can be selected according to receiving satellite signal qualities of user equipment, thereby increasing a resource utilization rate of the mobile communication network.

Description

Method, system and equipment for transmitting satellite message

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method, a system, and a device for transmitting a satellite packet.

Background

The current Beidou satellite navigation system can provide short message service.

The short message in the Beidou satellite navigation system supports the transmission of 120 Chinese characters with 1680 bits. Each user machine has a unique identification number (ID) and adopts a one-user one-secret encryption mode. The communication is forwarded through a ground central station. The process is as follows:

the short message sender firstly encrypts the ID and the communication application number of the receiver and forwards the inbound message through the satellite

After receiving the communication application signal, the ground central station adds the information into the continuously broadcasted outbound broadcast message after decryption and re-encryption, and broadcasts the message to the user through the satellite

The receiver user machine receives the outbound signal, demodulates and decrypts the outbound telegraph text, and completes one-time communication.

The transmission time delay of short message communication is about 0.5 second, and the communication frequency is 1 second/time at most.

However, when the terminal is located indoors and cannot receive satellite signals, but information interaction with a certain terminal capable of receiving Beidou signals is expected, the terminal can be carried out only outdoors or on a communication vehicle. For example: in the war, the command of fighting can be directly sent to the front line through the big dipper terminal through the commander, and the information in the front is fed back to the commander to the front line. In modern times, such scenarios may also occur against natural disasters, earthquake rescue, and the like.

At present, a scheme for receiving a short message in a scene that a terminal cannot receive a satellite signal is not disclosed.

Disclosure of Invention

The invention provides a method, a system and equipment for transmitting satellite messages, which are used for receiving short messages in a scene that a terminal cannot receive satellite signals.

The method for transmitting the satellite message provided by the embodiment of the invention comprises the following steps:

the satellite server checks the satellite signal receiving state of the terminal after a satellite message needing to be sent to the terminal exists;

and the satellite server sends a satellite message to the terminal through a wireless mobile communication network after determining that the satellite signal cannot be transmitted through the satellite according to the satellite signal receiving state of the terminal.

Preferably, the satellite server checks the satellite signal receiving status of the terminal, and includes:

and the satellite server sends a satellite message to the terminal through the satellite after determining that the satellite can transmit through the satellite according to the satellite signal receiving state of the terminal.

Preferably, before the satellite server checks the satellite signal receiving state of the terminal, the method further includes:

the satellite server receives a satellite signal reception state from the terminal.

Preferably, the receiving, by the satellite server, the satellite signal receiving state of the terminal includes:

and the satellite server receives the satellite signal receiving state of the terminal through a wireless mobile communication network or a wired network.

Preferably, the sending, by the satellite server, the satellite message to the terminal through the wireless mobile communication network includes:

and the satellite server sends the satellite message to a wireless mobile communication network through a satellite gateway so that the wireless mobile communication network sends the satellite message to the terminal in one of broadcasting, multicasting and short messages.

Another method for transmitting a satellite message provided in the embodiment of the present invention includes:

the satellite signal receiving state determined by the terminal;

the terminal sends the currently determined satellite signal receiving state to a satellite server, so that the satellite server sends a satellite message to the terminal through a wireless mobile communication network after determining that the satellite transmission cannot be carried out according to the satellite signal receiving state of the terminal.

Preferably, after the terminal determines the satellite signal receiving state and before sending the currently determined satellite signal receiving state to the satellite server, the method further includes:

the terminal determines that the satellite signal receiving state changes.

Preferably, the terminal sends the currently determined satellite signal receiving state to the satellite server, and includes:

and the terminal sends the currently determined satellite signal receiving state to a satellite server through a wireless mobile communication network or a wired network.

Preferably, the terminal transmits the currently determined satellite signal reception state to the satellite server through the wireless mobile communication network, including:

the terminal sends the currently determined satellite signal receiving state to a wireless mobile communication network, so that the wireless mobile communication network sends the currently determined satellite signal receiving state to a satellite server through a satellite gateway;

the terminal sends the currently determined satellite signal receiving state to the satellite server through the cable network, and the method comprises the following steps:

and the terminal packages the information of the currently determined satellite signal receiving state and sends the information as user data to a satellite server through a wired network.

Preferably, the satellite signal receiving state determined by the terminal includes:

when the satellite signal receiving state determined by the terminal for the last time is that the satellite signal can be transmitted, and the current satellite signal quality value is lower than a first threshold value, determining that the satellite signal receiving state is that the satellite signal cannot be transmitted; when the satellite signal receiving state determined last time is that the satellite transmission cannot be carried out and the current satellite signal quality value is higher than a second threshold value, determining that the satellite signal receiving state can be carried out through the satellite transmission, wherein the first threshold value is lower than the second threshold value; or

When the satellite signal receiving state determined by the terminal for the last time is that the satellite signal can be transmitted, and the number of the currently detected satellites is lower than a third threshold value, determining that the satellite signal receiving state is that the satellite signal cannot be transmitted; and when the satellite signal receiving state determined last time is that the satellite transmission cannot be carried out and the number of the currently detected satellites is higher than a fourth threshold value, determining that the satellite signal receiving state can be carried out through the satellite transmission, wherein the third threshold value is lower than the fourth threshold value.

Preferably, the terminal determines each threshold value by one of the following methods:

the terminal determines each threshold value through preset setting;

the terminal determines each threshold value through a radio resource control protocol (RRC) signaling;

the terminal determines each threshold value through an access network discovery and selection function ANDSF or an open mobile alliance device management OMA-DM protocol.

The satellite server for transmitting satellite messages provided by the embodiment of the invention comprises:

the processing module is used for checking the satellite signal receiving state of the terminal after a satellite message needing to be sent to the terminal exists;

and the transmission module is used for sending a satellite message to the terminal through a wireless mobile communication network after determining that the satellite transmission cannot be carried out according to the satellite signal receiving state of the terminal.

Preferably, the processing module is specifically configured to:

and according to the satellite signal receiving state of the terminal, after the satellite transmission is determined to be available, sending a satellite message to the terminal through the satellite.

Preferably, the processing module is further configured to:

after receiving the satellite signal reception state from the terminal, the satellite signal reception state of the terminal is checked.

Preferably, the transmission module is specifically configured to:

and receiving the satellite signal receiving state of the terminal through a wireless mobile communication network or a wired network.

Preferably, the transmission module is specifically configured to:

and sending the satellite message to a wireless mobile communication network through a satellite gateway so that the wireless mobile communication network sends the satellite message to the terminal in one of broadcasting, multicasting and short messages.

The terminal for transmitting satellite messages provided by the embodiment of the invention comprises:

the determining module is used for determining the satellite signal receiving state;

and the notification module is used for sending the currently determined satellite signal receiving state to a satellite server so that the satellite server sends a satellite message to the terminal through a wireless mobile communication network after determining that the satellite signal receiving state of the terminal cannot be transmitted through a satellite.

Preferably, the notification module is further configured to:

and after determining that the satellite signal receiving state changes, sending the currently determined satellite signal receiving state to a satellite server.

Preferably, the notification module is specifically configured to:

and transmitting the currently determined satellite signal reception state to a satellite server through a wireless mobile communication network or a wired network.

Preferably, the notification module is specifically configured to:

when the currently determined satellite signal receiving state is sent to the satellite server through the wireless mobile communication network, the currently determined satellite signal receiving state is sent to the wireless mobile communication network, so that the currently determined satellite signal receiving state is sent to the satellite server through the satellite gateway by the wireless mobile communication network;

and when the currently determined satellite signal receiving state is sent to the satellite server through the cable network, the currently determined satellite signal receiving state is subjected to information packaging and is sent to the satellite server through the cable network as user data.

Preferably, the determining module is specifically configured to:

when the satellite signal receiving state determined last time is that the satellite signal can be transmitted and the current satellite signal quality value is lower than a first threshold value, determining that the satellite signal receiving state is that the satellite signal cannot be transmitted; when the satellite signal receiving state determined last time is that the satellite transmission cannot be carried out and the current satellite signal quality value is higher than a second threshold value, determining that the satellite signal receiving state can be carried out through the satellite transmission, wherein the first threshold value is lower than the second threshold value; or

When the satellite signal receiving state determined last time is that the satellite signal can be transmitted and the number of the currently detected satellites is lower than a third threshold value, determining that the satellite signal receiving state is that the satellite signal cannot be transmitted; and when the satellite signal receiving state determined last time is that the satellite transmission cannot be carried out and the number of the currently detected satellites is higher than a fourth threshold value, determining that the satellite signal receiving state can be carried out through the satellite transmission, wherein the third threshold value is lower than the fourth threshold value.

Preferably, the determining module is specifically configured to determine each threshold value through one of the following manners:

determining each threshold value through preset setting;

determining each threshold value through RRC signaling;

the threshold values are determined by the access network discovery and selection function ANDSF or the open mobile alliance device management, OMA-DM, protocol.

The system for transmitting satellite messages provided by the embodiment of the invention comprises:

the satellite server is used for checking the satellite signal receiving state of the terminal after a satellite message needing to be sent to the terminal exists, and sending the satellite message to the terminal through a wireless mobile communication network after determining that the satellite transmission cannot be carried out according to the satellite signal receiving state of the terminal;

and the terminal is used for determining the satellite signal receiving state and sending the currently determined satellite signal receiving state to the satellite server so that the satellite server sends a satellite message to the terminal through a wireless mobile communication network after determining that the satellite signal receiving state of the terminal cannot be transmitted through a satellite.

According to the embodiment of the invention, the satellite server sends the satellite message to the terminal through the wireless mobile communication network after determining that the satellite signal can not be transmitted through the satellite according to the satellite signal receiving state of the terminal, so that the satellite message is sent to the terminal through the mobile communication network, and the system performance is improved; furthermore, the method can select which mode to send the satellite message according to the quality of the satellite signal received by the user equipment, so that the resource utilization rate of the mobile communication network is also improved.

Drawings

Fig. 1 is a schematic diagram of a network architecture according to a first embodiment of the present invention;

fig. 2 is a schematic diagram of a method for sending downlink data at a satellite gateway according to a second embodiment of the present invention;

fig. 3 is a schematic diagram of a method for transmitting downlink data at an intermediate node side according to a third embodiment of the present invention;

fig. 4 is a schematic diagram of a receiving method of downlink data at a terminal side according to a fourth embodiment of the present invention;

FIG. 5 is a schematic view of a fifth embodiment of the present invention;

FIG. 6 is a schematic view of a sixth embodiment of the present invention;

FIG. 7 is a diagram illustrating a seventh embodiment of the present invention;

FIG. 8 is a schematic view of an eighth embodiment of the present invention;

fig. 9 is a schematic structural diagram of a system for transmitting satellite messages according to the ninth embodiment of the present invention;

fig. 10 is a schematic structural diagram of a satellite server in a system for transmitting satellite messages according to a tenth embodiment of the present invention;

fig. 11 is a schematic structural diagram of a user equipment in a system for transmitting satellite messages according to an eleventh embodiment of the present invention;

fig. 12 is a schematic structural diagram of a satellite server in a system for transmitting satellite messages according to a twelfth embodiment of the present invention;

fig. 13 is a schematic structural diagram of a user equipment in a system for transmitting satellite messages according to a thirteenth embodiment of the present invention;

fig. 14 is a schematic structural diagram of a system for transmitting satellite messages according to a fourteenth embodiment of the present invention;

fig. 15 is a schematic structural diagram of a system for transmitting satellite messages according to fifteen embodiments of the present invention.

Detailed Description

The satellite message of the embodiment of the invention can be a satellite short message or a satellite message with other lengths.

There is a satellite communication identifier for satellite communication and a mobile communication identifier for mobile communication for each terminal.

The terminal of the embodiment of the invention is a terminal capable of working in a satellite communication network and a mobile communication network.

In the embodiment of the present invention, a satellite gateway is added in a mobile communication network, a network architecture of the satellite gateway is shown in fig. 1, the satellite gateway is connected to a short message gateway and/or a BM-SC (Broadcast-Multicast Service center) in the mobile communication network, specifically:

if a satellite message is issued to a terminal in a mobile communication Network in a scrambling mode or a broadcasting mode by using a Radio Network Temporary Identity (RNTI) which is configured in advance and used for satellite communication, the satellite gateway is connected with a short message gateway, and the satellite gateway can directly encapsulate the satellite message received from a satellite ground station or a satellite server (such as a Beidou satellite server) into a short message format and send the short message to the short message gateway; the satellite gateway can receive the short message from the short message gateway, analyze the short message and transmit the satellite message carried in the short message to a satellite ground station or a satellite server;

if the multicast mode is adopted to send the satellite message to the terminal in the mobile communication network, the satellite gateway is connected with the BM-SC, and the satellite gateway can directly send the satellite message received from the satellite ground station or the satellite server to the BM-SC; and the satellite gateway can receive the satellite message sent by the BM-SC and transmit the satellite message to a satellite ground station or a satellite server.

Preferably, the satellite gateway and the short message gateway can be connected through an existing interface (such as a reference point 1 interface and the like).

Preferably, the address information corresponding to the satellite gateway may be identified by using a coding rule defined by international public telecommunication numbering plan (international public telecommunication numbering plan) e.164, and other network nodes (such as a network node in the mobile communication network and a network node in the satellite communication network) may address the satellite gateway according to the address information corresponding to the satellite gateway.

In the embodiment of the present invention, the intermediate node in the mobile communication network refers to a network device for transmitting data in the mobile communication network, and the mobile communication networks for transmitting data may be different based on different network technologies (e.g., 2G/3G network, LTE network) and different message transmission manners.

In the following, embodiments of the present invention are described in further detail with reference to the drawings in the specification, and all the embodiments of the present invention are described by taking an LTE network as an example, and other networks are similar to the LTE network and are not listed here.

Referring to fig. 2, a method for sending downlink data at a satellite gateway according to an embodiment of the present invention includes the following steps:

step 21, a satellite gateway receives a satellite message sent by a terminal in a satellite communication network;

in this step, the satellite packet carries a satellite communication identifier of the terminal (i.e., a sender of the satellite packet) and a satellite communication identifier of a receiver of the satellite packet.

In implementation, the satellite gateway receives a satellite message sent by the terminal through a satellite ground station or a satellite server (such as a beidou satellite server) in a satellite communication network.

Specifically, when a terminal needs to send a satellite message to the terminal, a corresponding satellite message is generated in a one-user-one-secret mode, and the satellite message is sent to a satellite ground station or a satellite server and sent to a satellite gateway, wherein the satellite message carries a satellite communication identifier of the terminal and a satellite communication identifier of a receiver of the satellite message; and the satellite ground station or the satellite server decrypts the received satellite message, encrypts the satellite message in an encryption and decryption mode used by the receiver of the satellite message according to the identification information of the receiver carried in the satellite message, and sends the encrypted satellite message to the satellite gateway.

And step 22, the satellite gateway sends the received satellite message to an intermediate node in the mobile communication network so as to instruct the intermediate node to send the satellite message to a terminal in the mobile communication network.

In this step, when the intermediate node issues the satellite message to the terminal in the mobile communication network, the transmitted objects are all terminals in the mobile communication network, so that the terminal with the satellite message receiving capability in the mobile communication network can receive the satellite message issued by the intermediate node, but because the satellite message is encrypted in a one-user-one-secret manner, only the receiver of the satellite message can correctly decrypt the satellite message to obtain the content of the satellite message.

In the embodiment of the invention, the satellite gateway receives the satellite message sent by the terminal in the satellite communication network and sends the satellite message to the intermediate node in the mobile communication network so as to instruct the intermediate node to send the satellite message to the terminal in the mobile communication network, thereby realizing sending the satellite message sent by the terminal to the terminal in the mobile communication network.

In the implementation, the satellite gateway sends the received satellite message to the intermediate node in the mobile communication network in step 22, which may adopt any one of the following manners:

in the mode 1, the satellite gateway directly packages the received satellite message as the load of the short message of the mobile communication network into a short message format, sends the short message to the short message gateway, and indicates that the short message received by the short message gateway carries the satellite message.

Specifically, after receiving a satellite message from a satellite ground station or a satellite server, the satellite gateway directly encapsulates the received satellite message into a short message format as a load of a short message of the mobile communication network, that is: in the packaging process, the satellite gateway does not analyze the content of the satellite message, directly packages the content into a short message format of a mobile communication network, and sends the short message to the short message gateway.

In this way, the satellite gateway may indicate that the short message received by the short message gateway carries the satellite packet by adopting any one of the following manners:

in the mode a1, when the satellite gateway directly encapsulates the received satellite message as the load of the short message of the mobile communication network into a short message format, the message carrying the short message sent to the short message gateway carries first indication information for indicating that the short message received by the short message gateway carries the satellite message;

in this way, because the satellite gateway sets the first indication information in the message carrying the short message sent to the short message gateway to indicate that the short message received by the short message gateway carries the satellite packet, no additional signaling overhead is required.

In the mode B1, the satellite gateway sends an indication signaling to the short message gateway to indicate that the short message received by the short message gateway carries the satellite packet.

In this way, the satellite gateway can send an indication signaling to the short message gateway before receiving a satellite message sent by the terminal through the satellite ground station or the satellite server to indicate that the short message gateway subsequently receives the short message sent by the satellite gateway and all carries the satellite message, namely, the satellite gateway only needs to send the indication signaling to the short message gateway once; the satellite gateway may also send an indication signaling to the short message gateway after receiving a satellite message sent by the terminal through the satellite ground station or the satellite server each time and before sending the short message carrying the satellite message, so as to indicate that the short message received by the short message gateway carries the satellite message, that is, the satellite gateway sends the indication signaling to the intermediate node once before sending the short message carrying the satellite message each time.

Based on the above mode 1, after the short message gateway receives the short message sent by the satellite gateway, the intermediate node (including the short message gateway and the core network control node) may issue the short message sent by the satellite gateway to the terminal in the mobile communication network in a manner of scrambling the RNTI that is configured in advance and used for satellite communication; or sending short messages sent by the satellite gateway to the terminal in the mobile communication network in a broadcasting mode. Specifically, the method of sending the short message in which mode is adopted can be configured to the intermediate node in advance.

Based on the above mode 1, if the intermediate node sends the short message to the terminal in the mobile communication network in a manner that the RNTI configured in advance and used for satellite communication scrambles the downlink control channel for carrying the satellite message, before the satellite gateway sends the short message to the short message gateway, the method further includes:

the satellite gateway acquires the distribution area of the satellite message according to the preconfigured information, determines the addressing information of the core network control node in the distribution area of the satellite message, and carries the addressing information in the message carrying the short message.

For example, the satellite gateway configures information of an area (i.e., a distribution area of the satellite message) in the mobile communication network where the satellite gateway can send the satellite message, and then the satellite gateway may determine a core network control node in the distribution area according to the information of the distribution area, and further obtain addressing information of the determined core network control node.

Correspondingly, after receiving the message carrying the short message sent by the satellite gateway, the short message gateway sends the short message to the core network control node corresponding to the addressing information according to the addressing information carried in the message carrying the short message, wherein the short message gateway does not analyze the content of the short message.

Based on the mode 1, a downlink control channel for carrying satellite messages is issued by using a preconfigured RNTI for satellite communication to scramble a satellite message for an intermediate node, a network side fixedly allocates an RNTI for satellite communication for all terminals with satellite message receiving capability in a mobile communication network, that is, all terminals with satellite message receiving capability fixedly allocate a same RNTI, each terminal monitors the downlink control channel, and receives a short message sent from the intermediate node on a shared channel scheduled by the downlink control channel when the preconfigured RNTI for satellite communication is detected, so that the short message can be received by all terminals preconfigured with the RNTI for satellite communication; in the embodiment of the invention, the network side only needs to fixedly allocate one RNTI for satellite communication for all terminals with satellite message receiving capacity, thereby reducing the network processing complexity and saving the network resources.

It should be noted that, in a mechanism for receiving a short message by a terminal at present, a Network side temporarily allocates a C-RNTI (Cell Radio Network Temporary Identifier) to each terminal, that is, each terminal temporarily allocates a different C-RNTI, each terminal monitors a downlink control channel, and receives a short message on a shared channel scheduled by the downlink control channel when detecting that the C-RNTI allocated by the Network side is detected, and thus, the short message is only received by a receiver of the short message; in the existing short message receiving system, because the network side temporarily allocates one C-RNTI for each terminal, when sending a short message, the network side needs to scramble by using the C-RNTI corresponding to the receiver of the short message, thereby increasing the network processing complexity, and the network side needs to store the mapping relation between each terminal and the C-RNTI, thereby increasing the network resource overhead.

Preferably, the RNTI pre-configured and used for satellite communication may be defined as BDS-RNTI.

In the mode 1, the satellite gateway directly encapsulates the received satellite message as the load of the short message of the mobile communication network into a short message format, sends the short message to the short message gateway, and indicates that the short message received by the short message gateway carries the satellite message.

In the mode 2, the satellite gateway directly sends the received satellite message to the BM-SC as an MBMS (Multimedia broadcast multicast Service) Service content, and indicates that the message received by the BM-SC carries the satellite message.

Specifically, after receiving a satellite message from a satellite ground station or a satellite server, the satellite gateway directly sends the received satellite message to the BM-SC as MBMS service content, that is: in the process, the satellite gateway does not analyze the content of the satellite message and directly sends the received satellite message to the BM-SC.

In implementation, mode 2 further includes the following two preferred implementations:

as a preferred implementation manner, the satellite gateway sends a first request message to the BM-SC, where the first request message is used to request the BM-SC to initiate a process of allocating dedicated MBMS resources for all satellite messages sent by the satellite gateway; and after receiving a response message returned by the BM-SC, the satellite gateway directly sends the received satellite message to the BM-SC, wherein the response message is used for informing that the allocation of the special MBMS resources of the satellite gateway is completed.

Based on the preferred implementation, after receiving a first request message sent by a satellite gateway, the BM-SC initiates a dedicated MBMS resource allocation process for bearing all satellite messages sent by the satellite gateway according to the first request message; after completing the allocation of the dedicated MBMS resources, the BM-SC sends a response message to the satellite gateway to inform the satellite gateway that the allocation of the dedicated MBMS resources is completed; then, BM-SC receives satellite message sent by satellite gateway; further, the intermediate node (including BM-SC, MBMS gateway and core network control node) uses multicast mode to issue satellite message to the terminal in the mobile communication network, i.e. the intermediate node uses dedicated MBMS resource to issue satellite message to the terminal in the mobile communication network.

In the preferred implementation manner, the satellite gateway sends the first request message to the BM-SC, and after the intermediate node (including the BM-SC, the MBMS gateway, and the core network control node) completes allocation of dedicated MBMS resources for bearing all satellite messages sent by the satellite gateway, the satellite gateway sends the satellite message to the BM-SC, so that the intermediate node sends the satellite message using the allocated dedicated MBMS resources. In this way, before sending the satellite message, the satellite gateway sends a first request message to the BM-SC, the BM-SC only needs to initiate a flow for establishing dedicated MBMS resources once, and the intermediate node uses the allocated dedicated MBMS resources to issue each satellite message subsequently sent by the satellite gateway to the terminal in the mobile communication network.

As another preferred implementation manner, the satellite gateway sends a second request message to the BM-SC, where the second request message is used to request the BM-SC to initiate a process of allocating a temporary MBMS resource to the satellite packet carried in the second request message and to use the temporary MBMS resource to issue the satellite packet to a terminal in the mobile communication network.

Based on the preferred implementation manner, after receiving a second request message sent by the satellite gateway, the BM-SC initiates an allocation process of a temporary MBMS resource for carrying the satellite message transmitted this time according to the second request message; further, the intermediate node (including BM-SC, MBMS gateway and core network control node) issues the satellite message to the terminal in the mobile communication network in a multicast mode, that is, the intermediate node issues the satellite message carried in the second request message to the terminal in the mobile communication network by using the temporary MBMS resource.

In the preferred implementation manner, the satellite gateway sends a second request message to the BM-SC, where the second request message carries a satellite message, and after the intermediate node (including the BM-SC, the MBMS gateway, and the core network control node) completes allocation of a temporary MBMS resource for carrying the satellite message transmitted this time, the intermediate node directly uses the temporary MBMS resource to issue the satellite message carried in the second request message to the terminal in the mobile communication network. In this way, after receiving the satellite message each time, the satellite gateway sends a second request message to the BM-SC, and the second request message carries the satellite message, after receiving the second request message each time, the BM-SC needs to initiate a flow to establish a temporary MBMS resource, and the intermediate node uses the temporary MBMS resource to issue the satellite message carried in the second request message to a terminal in the mobile communication network.

It should be noted that, the procedure for the BM-SC to initiate the establishment of the MBMS resource (dedicated MBMS resource or temporary MBMS resource) specifically refers to the protocol TS23.246, and is not described herein again.

In the mode 2, the satellite gateway directly sends the received satellite message as the MBMS service content to the BM-SC and indicates that the message received by the BM-SC carries the satellite message, and in this process, the satellite gateway does not analyze the content of the received satellite message, thereby reducing the processing complexity of the satellite gateway and improving the transmission efficiency of the satellite message.

Based on the same inventive concept, referring to fig. 3, a method for transmitting downlink data at an intermediate node side in a mobile communication network according to an embodiment of the present invention includes:

step 31, the intermediate node receives a satellite message sent by a satellite gateway;

and step 32, the intermediate node issues the satellite message to a terminal in the mobile communication network.

The embodiment of the invention realizes that the satellite message of the terminal is transmitted to the terminal in the mobile communication network by the method.

In implementation, step 32 further includes the following three implementations:

in the first mode, the intermediate node transmits the satellite message to a terminal in a mobile communication network in a mode of scrambling a downlink control channel for bearing the satellite message by using an RNTI (radio network temporary identifier) which is configured in advance and used for satellite communication.

In this way, the satellite gateway sends the satellite message to the short message gateway by adopting the above-mentioned mode 1, that is, the satellite gateway directly encapsulates the received satellite message as the load of the short message of the mobile communication network into a short message format, sends the short message to the short message gateway, and indicates that the short message received by the short message gateway carries the satellite message, then:

the step 31 specifically comprises: the short message gateway receives a short message which is sent by the satellite gateway and encapsulated with a satellite message;

in this step, the short message received by the short message gateway is in a short message format in which the satellite gateway directly encapsulates the received satellite message as a load of the short message of the mobile communication network, and in this process, the satellite gateway does not analyze the content of the received satellite message.

The step 32 is specifically: the short message gateway sends the received short message to a core network control node and indicates that the short message received by the core network control node carries a satellite message; and the core network control node sends the received short message to a subordinate base station and instructs the base station to transmit the received short message to a terminal in a mobile communication network in a pre-configured mode of scrambling RNTI (radio network temporary identity) used for satellite communication.

Specifically, after receiving a message carrying a short message sent by a satellite gateway, a short message gateway does not analyze the content of the short message, sends the short message to a core network control node, and indicates that the short message received by the core network control node carries a satellite message; after receiving the message carrying the short message sent by the short message gateway, the core network control node does not analyze the content of the short message, sends the short message to a subordinate base station, and instructs the base station to transmit the received short message to a terminal in a mobile communication network in a pre-configured mode of scrambling RNTI (radio network temporary identity) used for satellite communication.

Further, if the message carrying the short message received by the short message gateway from the satellite gateway carries addressing information, the sending of the received short message by the short message gateway to the core network control node specifically includes:

and the short message gateway sends the received short message to a core network control node corresponding to the addressing information according to the addressing information carried in the message carrying the short message sent by the satellite gateway.

Because the message carrying the short message carries the addressing information of the core network control node, the short message gateway does not need to acquire the routing information from the subscription server, and directly sends the received short message to the corresponding core network control node according to the addressing information of the core network control node.

In this manner, the core network control node sends the received short message to a subordinate base station, which specifically includes:

the core network control node directly sends the received short message to all base stations under the control node; or,

the core network control node sends the received short message to a subordinate base station thereof in a polling mode; or,

and the core network control node sends the received short message to the subordinate base stations based on the idle busy time of each subordinate base station.

In this way, after receiving a short message sent by a core network control node, a base station scrambles a downlink control channel for carrying a satellite message by using a preconfigured RNTI for satellite communication, and sends the short message to all terminals served by the base station on a preconfigured sending time and a downlink shared channel scheduled by the downlink control channel.

In this manner, the base station and each terminal are configured with RNTI for satellite communication in advance. Therefore, each terminal monitors a downlink control channel to detect whether the RNTI for satellite communication is used, if so, short messages sent by a base station are received on downlink resources scheduled by the downlink control channel, and then the short messages are unpacked to obtain satellite messages. In this way, when sending downlink data, both the satellite gateway and the intermediate node do not need to know the mobile communication identifier of the receiver of the satellite message, and therefore, in this way, the satellite gateway does not need to store the corresponding relationship between the satellite communication identifier of the receiver and the mobile communication identifier, and therefore, the cooperation of the identifiers between the mobile communication network and the satellite communication network is not needed, and the processing complexity of the satellite gateway is also reduced.

Preferably, the preconfigured RNTI for satellite communication may be preconfigured to a base station in the mobile communication network through a protocol.

Preferably, the preconfigured RNTI for satellite communication may be defined as BDS-RNTI.

And in the second mode, the intermediate node transmits the satellite message to the terminal in the mobile communication network in a broadcasting mode.

In this way, the satellite gateway adopts the above-mentioned mode 1, that is, the satellite gateway directly encapsulates the received satellite message as the load of the short message of the mobile communication network into a short message format, sends the short message to the short message gateway, and indicates that the short message received by the short message gateway carries the satellite message, then:

The step 32 is specifically: the short message gateway sends the received short message to a core network control node and indicates the core network control node that the short message carries a satellite message; the core network control node sends the received short message to a subordinate base station and instructs the base station to transmit the received short message by using a predefined SIB (System Information Block) for transmitting a satellite message.

Specifically, after receiving a message carrying a short message sent by a satellite gateway, a short message gateway does not analyze the content of the short message, sends the short message to a core network control node, and indicates that the short message received by the core network control node carries a satellite message; after receiving the message carrying the short message sent by the short message gateway, the core network control node does not analyze the content of the short message, sends the short message to a subordinate base station, and instructs the base station to transmit the received short message by adopting a defined SIB for transmitting a satellite message.

In this way, after receiving the short message sent by the core network control node, the base station uses the predefined SIB for transmitting the satellite message to send the received short message to the terminal in the mobile network.

And thirdly, the intermediate node transmits the satellite message to the terminal in the mobile communication network in a multicast mode.

In this way, the satellite gateway sends the satellite packet in the above-mentioned way 3, that is, the satellite gateway directly sends the received satellite packet to the BM-SC as the MBMS service content, and indicates that the message received by the BM-SC carries the satellite packet, specifically:

if the satellite gateway sends a first request message to the BM-SC, where the first request message is used to request the BM-SC to initiate a process of allocating dedicated MBMS resources for all satellite packets sent by the satellite gateway, then:

the step 31 specifically comprises: BM-SC receives a first request message sent by a satellite gateway and initiates a distribution process of dedicated MBMS resources for bearing all satellite messages sent by the satellite gateway according to the first request message; after completing the allocation of the dedicated MBMS resources, the BM-SC sends a response message to the satellite gateway to inform the satellite gateway that the allocation of the dedicated MBMS resources is completed; and BM-SC receives satellite messages sent by the satellite gateway;

the step 32 is specifically: BM-SC sends the received satellite message sent by the satellite gateway to the MBMS gateway; the MBMS gateway sends the satellite message to a core network control node by using a special MBMS resource; and the core network control node transmits the satellite message to a subordinate base station by using the special MBMS resource and instructs the base station to transmit the satellite message to a terminal in the mobile communication network by using the special MBMS resource.

Specifically, after receiving a satellite message sent by a satellite gateway, the BM-SC does not analyze the content of the satellite message and sends the satellite message to the MBMS gateway; after receiving the satellite message sent by the BM-SC, the MBMS gateway does not analyze the content of the satellite message, and sends the satellite message to a core network control node by using a special MBMS resource; after receiving the satellite message sent by the MBMS gateway, the core network control node does not analyze the content of the satellite message, uses the special MBMS resource to send the satellite message to the subordinate base station, and instructs the base station to use the special MBMS resource to send the satellite message to the terminal in the mobile communication network.

If the satellite gateway sends a second request message to the BM-SC, the second request message is used to request the BM-SC to initiate a process of allocating a temporary MBMS resource to the satellite message carried in the second request message and to use the temporary MBMS resource to issue the satellite message to a terminal in the mobile communication network, then:

the step 31 specifically comprises: BM-SC receives a second request message sent by the satellite gateway and initiates a distribution process of temporary MBMS resources for bearing the satellite message transmitted at this time according to the satellite message carried in the second request message;

the step 32 is specifically: BM-SC sends the satellite message carried in the second request message to MBMS gateway; the MBMS gateway sends the satellite message to a core network control node by using the temporary MBMS resources; and the core network control node transmits the received satellite message to a subordinate base station by using the temporary MBMS resource and instructs the base station to transmit the satellite message to a terminal in the mobile communication network by using the temporary MBMS resource.

Specifically, the BM-SC does not analyze the content of the satellite packet carried in the second request message, and sends the satellite packet to the MBMS gateway; after receiving the satellite message sent by the BM-SC, the MBMS gateway does not analyze the content of the satellite message, and sends the satellite message to a core network control node by using a temporary MBMS resource; and after receiving the satellite message sent by the MBMS gateway, the core network control node does not analyze the content of the satellite message, uses the temporary MBMS resource to send the satellite message to a subordinate base station, and instructs the base station to use the temporary MBMS resource to send the satellite message to a terminal in the mobile communication network.

Based on the same inventive concept, an embodiment of the present invention provides a method for receiving downlink data at a terminal side, as shown in fig. 4, where the method includes the following steps:

step 41, a terminal with satellite message receiving capability in the mobile communication network receives a satellite message issued by a satellite gateway through an intermediate node in the mobile communication network;

and step 42, the terminal decrypts the received satellite message by using the key for satellite communication to acquire the content of the satellite message.

The embodiment of the invention realizes that the terminal in the mobile communication network receives the satellite message of the terminal through the method.

In the implementation, in step 41, the step of receiving, by a terminal having a satellite message receiving capability in a mobile communication network, a satellite message issued by a satellite gateway through an intermediate node in the mobile communication network specifically includes:

if the intermediate node issues the satellite message to the terminal in the mobile communication network in the manner described above, that is, the intermediate node issues the short message encapsulated with the satellite message to the terminal in the mobile communication network in a manner that the intermediate node scrambles a downlink control channel for carrying the satellite message by using a pre-configured RNTI for satellite communication, then:

a terminal with satellite message receiving capability in a mobile communication network receives a short message sent by a satellite gateway through an intermediate node in the mobile communication network, wherein the short message carries a satellite message.

Specifically, the method comprises the following steps: and the terminal monitors a downlink control channel and receives the short message encapsulated with the satellite message sent by the intermediate node when monitoring the downlink control channel scrambled by the preset RNTI for satellite communication.

Further, the terminal receives the short message sent by the intermediate node at the pre-configured receiving time and on the downlink shared channel scheduled by the downlink control channel.

Further, step 42 specifically includes: the terminal de-encapsulates the received short message to obtain a satellite message in the short message, and decrypts the obtained satellite message by using a secret key used for satellite communication to obtain the content of the satellite message.

Further, if the terminal uses the key for satellite communication, and cannot correctly decrypt the acquired satellite message, the terminal discards the short message.

It should be noted that each terminal monitors a downlink control channel, and receives a short message sent by a satellite gateway through an intermediate node when monitoring the downlink control channel scrambled by a preconfigured RNTI for satellite communication, but only a receiver of the satellite message can correctly decrypt the satellite message carried in the short message.

If the intermediate node issues the satellite message to the terminal in the mobile communication network in the above manner, that is, the intermediate node issues the short message encapsulated with the satellite message to the terminal in the mobile communication network in a broadcast manner, then:

a terminal with satellite message receiving capability in a mobile communication network receives a short message sent by an intermediate node through a predefined SIB for transmitting satellite messages.

If the intermediate node issues the satellite message to the terminal in the three-way mobile communication network in the manner, that is, the intermediate node directly issues the satellite message to the terminal in the mobile communication network by using the dedicated MBMS resource for bearing all the satellite messages sent by the satellite gateway or the temporary MBMS resource for bearing the satellite message transmitted this time, then:

the terminal with satellite message receiving ability in the mobile communication network receives the satellite message issued by the intermediate node through the special MBMS resource or the temporary MBMS resource.

Further, step 42 specifically includes: the terminal decrypts the received satellite message by using the key for satellite communication to acquire the content of the satellite message.

Further, if the terminal uses the key for satellite communication, and cannot correctly decrypt the acquired satellite message, the terminal discards the satellite message.

The following describes in detail a transmission process of downlink data in the embodiments of the present invention with reference to several specific embodiments.

In one embodiment, the core network control node in the mobile communication network is an MME, wherein the MME supports an "SMS in MME" (short message in mobility management entity) feature, and the MME is directly connected to a short message gateway in the mobile communication network. In this embodiment, the intermediate node issues the satellite packet to the terminal in the mobile communication network in a manner of scrambling the preconfigured RNTI for satellite communication, as shown in fig. 5, a transmission process of the downlink data in this embodiment is as follows:

step 1, the satellite gateway directly packages the satellite message from the satellite ground station or the satellite server (such as a Beidou satellite server) into a short message format and sends the short message to the short message gateway.

In this step, the satellite gateway does not parse the content of the satellite message.

In this embodiment, assuming that the satellite gateway configures information of a satellite message distribution area, the satellite gateway determines a core network control node in the distribution area, and carries addressing information of the determined core network control node in a short message and sends the addressing information to the short message gateway.

In this step, the satellite gateway further sets first indication information in a message carrying the short message sent to the short message gateway, so as to indicate that the short message gateway carries the satellite packet in the short message.

And 2, after receiving the short message sent by the satellite gateway, the short message gateway sends the short message to a corresponding core network control node according to the addressing information carried in the message carrying the short message, and indicates that the short message received by the core network control node carries the satellite message.

In this step, the short message gateway may set the first indication information in the message carrying the short message sent to the core network control node to indicate that the short message received by the core network control node carries the satellite packet.

In this step, the short message gateway does not process the content of the received short message.

And 3, after the core network control node receives the short message sent by the short message gateway, the core network control node sends the short message to all base stations subordinate to the core network control node due to the fact that the received message carrying the short message carries the first indication information, and indicates the base stations to send the short message in a BDS-RNTI scrambling mode.

In this step, the core network control node may set the second indication information in the message carrying the short message sent to the base station, so as to instruct the base station to issue the short message in a BDS-RNTI scrambling manner.

In this step, the core network control node does not process the content of the received short message.

And 4, after the base station receives the short message sent by the core network control node, because the received message carrying the short message carries second indication information, the base station scrambles a downlink control channel for bearing the satellite message by using a pre-configured BDS-RNTI (BDS-radio network temporary identity) in the downlink control channel, and sends the short message encapsulated with the satellite message on a pre-configured sending time and a shared channel scheduled by the downlink control channel.

In this step, the base station does not process the content of the received short message.

And 5, the terminal with the satellite message receiving capability monitors a downlink control channel, receives the short message sent by the base station on a shared channel scheduled by the downlink control channel when monitoring the BDS-RNTI, decapsulates the received short message to obtain the satellite message, and decrypts the obtained satellite message by using a secret key used for satellite communication per se to obtain the content of the satellite message.

Further, if the terminal cannot correctly decrypt the acquired satellite message, the short message is discarded.

In this embodiment, the intermediate node issues the satellite packet to the terminal in the mobile communication network in a broadcast manner, as shown in fig. 6, the transmission process of the downlink data in this embodiment is as follows:

In this step, the satellite gateway does not parse the content of the received satellite message.

In this step, the satellite gateway further sets first indication information in the message carrying the short message sent to the short message gateway to indicate that the message received by the short message gateway carries the satellite message.

And 2, after receiving the short message sent by the satellite gateway, the short message gateway sends the short message to a core network control node subordinate to the short message gateway, and indicates that the short message received by the core network control node carries a satellite message.

In this step, the short message gateway may carry the first indication information in the message carrying the short message sent to the core network control node, so as to indicate that the short message received by the core network control node carries the satellite packet.

And 3, after the core network control node receives the short message sent by the short message gateway, because the received message carrying the short message carries the first indication information, the core network control node sends the short message to all the base stations subordinate to the core network control node and indicates the base stations to send the received short message in a broadcasting mode.

In this step, the core network control node may carry the second indication information in the message carrying the short message sent to the base station, so as to indicate the base station to issue the received short message in a broadcast manner.

And 4, after receiving the short message sent by the core network control node, the base station sends the received short message to a terminal in the mobile network by adopting a predefined SIB for transmitting the satellite message because the message carrying the short message carries the second indication information.

And 5, the terminal with the satellite message receiving capability receives the short message sent by the base station through the predefined SIB, decapsulates the received short message to obtain the satellite message, and decrypts the obtained satellite message by using the key for satellite communication to obtain the content of the satellite message.

In this embodiment, the intermediate node issues the satellite packet to the terminal in the mobile communication network in a multicast manner, as shown in fig. 7, the transmission process of the downlink data in this embodiment is as follows:

step 1, a satellite gateway receives a satellite message from a satellite ground station or a satellite server (such as a Beidou satellite server), and sends a satellite message sending request to a BS-SC, wherein the satellite message sending request is used for requesting the BM-SC to distribute special MBMS resources for all satellite messages sent by the satellite gateway.

Step 2, after receiving the satellite message sending request, the BM-SC initiates a process to establish a dedicated MBMS resource, which is described in detail in the establishment process of the MBMS resource in the protocol TS 23.246.

And step 3, the BM-SC sends a satellite message sending response to the satellite gateway to inform the completion of the distribution of the special MBMS resources of the satellite gateway.

And 4, after receiving the satellite message sending response, the satellite gateway sends the satellite message from the satellite ground station or the satellite server to the BM-SC.

And step 5, the BM-SC sends the satellite message to the MBMS gateway.

And step 6, the MBMS gateway sends the satellite message to an MME (Mobility Management Entity) by using the special MBMS resource.

And 7, the MME sends the satellite message to the eNodeB by using the special MBMS resource.

And step 8, the eNodeB (evolved node B) uses the special MBMS resource to send the satellite message to the terminal in the mobile communication network.

And 9, the terminal with the satellite message receiving capability receives the satellite message sent by the eNodeB through the special MBMS resource, and decrypts the acquired satellite message by using the key for satellite communication so as to acquire the content of the satellite message.

In this embodiment, the intermediate node also issues a satellite packet to a terminal in the mobile communication network in a multicast manner, as shown in fig. 8, a transmission process of downlink data in this embodiment is as follows:

step 1, a satellite gateway receives a satellite message from a satellite ground station or a satellite server (such as a Beidou satellite server), and sends a satellite message sending request to a BS-SC, wherein the satellite message sending request carries the received satellite message.

Step 2, after receiving the satellite message sending request, the BM-SC initiates a process to establish a temporary MBMS resource, which is described in detail in the establishment process of the MBMS resource in the protocol TS 23.246.

And step 3, the BM-SC sends the satellite message carried in the satellite message sending request to the MBMS gateway.

And 4, the MBMS gateway sends the satellite message to the MME by using the temporary MBMS resource.

And step 5, the MME sends the satellite message to the eNodeB by using the temporary MBMS resource.

And 6, the eNodeB uses the temporary MBMS resource to send the satellite message to a terminal in the mobile communication network.

And 7, the terminal with the satellite message receiving capability receives the satellite message sent by the eNodeB through the temporary MBMS resource, and decrypts the acquired satellite message by using the key for satellite communication so as to acquire the content of the satellite message.

The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

In the above embodiment, the satellite gateway receives the satellite message and then directly forwards the satellite message to the mobile communication network. Because the terminal is mobile, may be in the satellite signal receiving range, may not be in the satellite signal receiving range, in order to avoid losing information, the satellite gateway needs to forward all satellite messages to the mobile communication network, which may cause waste of network resources and reduce the resource utilization rate.

Aiming at the situation, the embodiment of the invention can also select which way to send the satellite message according to the quality of the satellite signal received by the user equipment, thereby reducing the waste of network resources and improving the resource utilization rate of the mobile communication network.

As shown in fig. 9, a system for transmitting a satellite message according to the ninth embodiment of the present invention includes: a satellite server 90 and a terminal 91.

The satellite server 90 is connected to the terminal 91 through a satellite network manager, an intermediate node, and a base station.

The satellite server 90 is used for checking the satellite signal receiving state of the terminal after a satellite message needing to be sent to the terminal exists; according to the satellite signal receiving state of the terminal, after determining that the satellite transmission cannot be carried out, sending a satellite message to the terminal through a wireless mobile communication network;

a terminal 91 for determining a satellite signal reception state; and sending the currently determined satellite signal receiving state to a satellite server.

The satellite signal receiving state is used to indicate whether the current terminal can receive through a satellite, for example, the satellite signal receiving state may be 1-bit information, where 1 indicates that the current terminal cannot transmit through the satellite, and 0 indicates that the current terminal can transmit through the satellite; the information bit stream may indicate whether or not the current terminal can receive information via a satellite.

In implementation, after determining that the satellite signal receiving state changes, the terminal sends the currently determined satellite signal receiving state to the satellite server.

For example, if the satellite signal reception state previously determined by the terminal is receivable by a satellite, but the currently determined satellite signal reception state is not receivable by a satellite, the satellite signal reception state changes and the satellite server needs to be notified.

The satellite signal receiving state determined by the terminal comprises the following steps:

when the satellite signal receiving state determined last time is that the satellite signal can be transmitted and the current satellite signal quality value is lower than a first threshold value, the terminal determines that the satellite signal receiving state is that the satellite signal cannot be transmitted; when the satellite signal receiving state determined last time is that the satellite transmission cannot be carried out and the current satellite signal quality value is higher than a second threshold value, determining that the satellite signal receiving state can be carried out through the satellite transmission, wherein the first threshold value is lower than the second threshold value; or

In implementation, in order to save power, when positioning is not needed, the satellite message may be received through the wireless mobile network instead of using the satellite. At this time, the terminal does not need to perform measurement any more but can directly determine that the current satellite signal quality value is 0 or the number of currently detected satellites is 0. If the terminal is disconnected from the network and is currently connected with the satellite, the terminal does not need to measure any more and can directly determine that the signal quality value of the current satellite is higher than the second threshold value or the number of the currently detected satellites is higher than the fourth threshold value.

For a terminal for measuring the satellite signal receiving state for the first time, when the quality value of the satellite signal is lower than a first threshold value, the satellite signal receiving state is determined to be incapable of being transmitted through the satellite and is notified to a satellite server, and when the quality value of the satellite signal is not lower than the first threshold value, the satellite signal receiving state is determined to be capable of being transmitted through the satellite and is notified to the satellite server; or

For a terminal for measuring the satellite signal receiving state for the first time, when the quality value of the satellite signal is lower than a second threshold value, the satellite signal receiving state is determined to be incapable of being transmitted through the satellite and is notified to a satellite server, and when the quality value of the satellite signal is not lower than the second threshold value, the satellite signal receiving state is determined to be capable of being transmitted through the satellite and is notified to the satellite server; or

For a terminal for measuring the satellite signal receiving state for the first time, when the number of detected satellites is lower than a third threshold value, the satellite signal receiving state is determined to be incapable of being transmitted through the satellites and is notified to a satellite server, and when the number of detected satellites is not lower than the third threshold value, the satellite signal receiving state is determined to be capable of being transmitted through the satellites and is notified to the satellite server; or

For the terminal for measuring the satellite signal receiving state for the first time, when the number of detected satellites is lower than the fourth threshold, it may be determined that the satellite signal receiving state is unable to be transmitted by the satellites and notified to the satellite server, and when the number of detected satellites is not lower than the fourth threshold, it may be determined that the satellite signal receiving state is able to be transmitted by the satellites and notified to the satellite server.

In addition to the above manner, when performing boot registration in a network, the default initial receiving state is satellite receiving, and then the state adjustment is performed according to the measurement result or the satellite receiving condition. The same is true at the satellite server side, where the initial default state is satellite reception, and then the state adjustment is performed.

the terminal determines each threshold value through preset setting, such as stipulation in a protocol;

the terminal determines each threshold value through RRC (Radio Resource Control, Radio Resource Control protocol) signaling, for example, notified by the network side;

the terminal determines each threshold value through an Access Network Discovery and Selection Function (ANDSF) or an OMA-DM (open mobile alliance device management protocol), for example, for the ANDSF, a core Network has an ANDSF functional entity, and may issue some policies and threshold values to the terminal, where the policies and threshold values may include a threshold value in satellite communication; for example, for OMA-DM, some configuration management of the terminal by the core network may be implemented in this way, such as updating some parameters in a SIM (Subscriber Identity Module) card, and so on, which may also download satellite related parameters.

After determining each threshold value in the above manner, the network side may also notify the terminal to update the threshold value as needed.

The reason for setting the two thresholds is to reduce the reporting frequency of the UE.

Correspondingly, the satellite server updates the satellite signal receiving state of the terminal after receiving the satellite signal receiving state of the terminal.

In implementation, the terminal may transmit the satellite signal receiving state and may identify its own identifier (which may be a satellite communication identifier for satellite communication or a mobile communication identifier for mobile communication), so that the satellite server may identify to which terminal the received satellite signal receiving state corresponds.

Accordingly, a satellite signal reception state from the terminal is received.

Preferably, when the terminal sends the satellite signal receiving state to the satellite server, the terminal may send the currently determined satellite signal receiving state to the satellite server through a wireless mobile communication network or a wired network;

accordingly, the satellite server receives the satellite signal reception state of the terminal through the wireless mobile communication network or the wired network.

Specifically, the method for transmitting the currently determined satellite signal receiving state to the satellite server by the terminal through the wireless mobile communication network includes:

the terminal sends the currently determined satellite signal receiving state to the wireless mobile communication network, so that the wireless mobile communication network sends the currently determined satellite signal receiving state to the satellite server through the satellite gateway;

and the terminal packages the information of the currently determined satellite signal receiving state and sends the information serving as user data to the satellite server through a cable network. For example, the terminal encapsulates the satellite signal receiving state through an application layer and forwards the satellite signal receiving state as user data to the satellite ground server through the internet.

And for the satellite server, according to the satellite signal receiving state of the terminal, after the satellite signal receiving state is determined to be capable of being transmitted through the satellite, the satellite server sends a satellite message to the terminal through the satellite.

When determining that the satellite message needs to be sent to the terminal through the wireless mobile communication network, the satellite server can send the satellite message to the wireless mobile communication network through the satellite gateway, so that the wireless mobile communication network sends the satellite message to the terminal through one of broadcasting, multicasting and short messages.

It should be noted that, the manner in which the wireless mobile communication network sends the satellite message to the terminal in the embodiment of the present invention is not limited to the above, and the embodiment of the present invention is applicable as long as the manner in which the satellite message can be sent to the terminal is all that is, for example, the satellite message is placed in the RRC signaling and sent to the terminal.

The following describes the embodiments of the present invention by way of a few examples.

1：

The network broadcasts the threshold of the satellite signal through RRC signaling, and goes into the wireless mobile network threshold th1 (i.e. the first threshold) and goes out of the wireless mobile network threshold th2 (i.e. the second threshold). The satellite terminal measures the satellite signal, and when the measurement result is lower than th1, the terminal reports the satellite signal receiving state to be "received through the wireless mobile communication network" (may be represented by 1 bit, 1 represents reception through the wireless mobile communication network, and 0 represents reception through the satellite). The information and the user identification are forwarded to a satellite gateway through a wireless mobile communication network, and are forwarded to a satellite ground server by a satellite network manager. The satellite ground server updates the storage mode of the user. When a satellite message sent to the user exists, the satellite ground server directly forwards the satellite message to the satellite gateway instead of sending the satellite message through the satellite, and the satellite message is issued through the wireless mobile communication network. Specifically, a satellite gateway receives a satellite message sent by a satellite terminal in a satellite communication network; the satellite gateway sends the received satellite message to an intermediate node in the mobile communication network so as to instruct the intermediate node to send the satellite message to a mobile terminal in the mobile communication network. The full-text satellite message can be sent in a broadcasting, multicasting or short message sending mode. And if the terminal can decode after receiving the message, the message is the satellite message of the terminal, otherwise, the message is discarded.

When the terminal starts satellite reception and the measurement of the satellite signal is higher than the threshold th2, the reception state of the user for the satellite message is changed to 'reception through the satellite', and the information is reported to the network and forwarded to the satellite ground server through the wireless mobile network. And if the satellite message sent to the terminal exists subsequently, the satellite sends the message.

2：

Similar to 1, but th1, th2 are not issued by RRC signaling, but by an operator deployed ANDSF or OMA-DM mechanism to the terminal.

3：

Similar to 1 and 2, but th1, th2 are not issued by the network, but by factory presets of the terminal, i.e. depending on the implementation of the manufacturer.

4：

When the terminal enters the wireless mobile communication network, in order to save electricity, the satellite message can be received through the wireless mobile network instead of the satellite message under the condition that the positioning is not needed. At this time, when the terminal resides in the network, the terminal reports the satellite signal receiving state of the terminal as 'receiving through the wireless mobile communication network'. When the terminal leaves the wireless mobile communication network, the network is informed that the satellite signal reception state is 'through satellite reception'. If the terminal is off-line and the network is not informed to update the state, the core network detects that the user is off-line, the state of the user is updated to be received through a satellite, and the information is sent to a satellite ground server through a satellite gateway.

5：

The terminal may send the self-reception status information through RRC signaling (for example, UE capability), or may send the self-reception status information through NAS (Non-Access Stratum) signaling (for example, TAU (tracking area Update), attach, and the like). If the RRC signaling is used for sending, the related information needs to be forwarded to a core network control node (e.g., MME) through an interface between the access network and the core network, and then forwarded to the satellite gateway by the core network control node. If sent using NAS signaling, the relevant information is forwarded to the satellite gateway via a core network control node (e.g., MME).

6：

The satellite receiving state information of the terminal can also be sent to a satellite ground server through an application layer. For example, a client of the Application program P1 in a certain Application layer is installed in a terminal, and performs information interaction with a bottom layer through an open API (Application Programming Interface). The terminal bottom layer determines the receiving state of the terminal bottom layer according to the signal intensity of the wireless mobile communication network and the satellite receiving condition, forwards the receiving state to the application layer program P1 through an API (application programming interface), packages information through the client of the application, and forwards the information serving as user data to the server end of the application program on the satellite ground server through the Internet. And the encapsulated information is extracted and stored on the satellite ground server through the application.

As shown in fig. 10, a satellite server in a system for transmitting satellite messages according to the tenth embodiment of the present invention includes:

the processing module 1000 is configured to check a satellite signal receiving state of the terminal after a satellite message needs to be sent to the terminal;

the transmission module 1010 is configured to send a satellite message to the terminal through the wireless mobile communication network after determining that the satellite transmission cannot be performed according to the satellite signal receiving state of the terminal.

Preferably, the processing module 1000 is specifically configured to:

Preferably, the processing module 1000 is further configured to:

Preferably, the transmission module 1010 is specifically configured to:

and sending the satellite message to the wireless mobile communication network through the satellite gateway so that the wireless mobile communication network sends the satellite message to the terminal in one of broadcasting, multicasting and short messages.

As shown in fig. 11, the user equipment in the system for transmitting satellite messages according to the eleventh embodiment of the present invention includes:

a determining module 1100 for determining a satellite signal receiving state;

the notification module 1110 is configured to send the currently determined satellite signal receiving state to the satellite server, so that the satellite server sends a satellite message to the terminal through the wireless mobile communication network after determining that the satellite signal receiving state of the terminal cannot be transmitted through a satellite.

Preferably, the notification module 1110 is further configured to:

Preferably, the notification module 1110 is specifically configured to:

Preferably, the determining module 1100 is specifically configured to:

Preferably, the determining module 1100 is specifically configured to determine each threshold value by one of the following manners:

determining each threshold value through preset setting;

determining each threshold value through RRC signaling;

the threshold values are determined by ANDSF or OMA-DM.

As shown in fig. 12, a satellite server in a system for transmitting satellite messages in twelve embodiments of the present invention includes:

a processor 1200, configured to check a satellite signal receiving state of the terminal after a satellite message that needs to be sent to the terminal exists, and send the satellite message to the terminal through a wireless mobile communication network after determining that satellite transmission cannot be performed according to the satellite signal receiving state of the terminal;

a transceiver 1210 for receiving and transmitting data under the control of the processor 1200.

The transceiver 1210 may be an entity having functions of transmitting and receiving data, such as a wireless network card and a wired network card.

Preferably, the transceiver 1210 is specifically configured to:

Preferably, the transceiver 1210 is further configured to:

Preferably, the transceiver 1210 is specifically configured to:

Where in fig. 12, the bus architecture may include any number of interconnected buses and bridges, with various circuits of one or more processors represented by processor 1200 and memory represented by memory 1220 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1210 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 in performing operations.

The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 in performing operations.

As shown in fig. 13, the user equipment in the system for transmitting satellite messages according to the thirteenth embodiment of the present invention includes:

a processor 1300, configured to determine a satellite signal receiving state, and send the currently determined satellite signal receiving state to a satellite server through a transceiver 1310, so that the satellite server sends a satellite message to a terminal through a wireless mobile communication network according to the satellite signal receiving state of the terminal after determining that satellite transmission cannot be performed;

a transceiver 1310 for receiving and transmitting data under the control of the processor 1300.

Preferably, the processor 1300 is further configured to:

Preferably, the processor 1300 is specifically configured to:

Preferably, the processor 1300 is specifically configured to determine the threshold values by one of the following:

determining each threshold value through preset setting;

determining each threshold value through RRC signaling;

the threshold values are determined by ANDSF or OMA-DM.

In fig. 13, among other things, the bus architecture may include any number of interconnected buses and bridges with various circuits being linked together, particularly one or more processors represented by processor 1300 and memory represented by memory 1320. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1310 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. User interface 1330 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1320 may store data used by the processor 1300 in performing operations.

Based on the same inventive concept, the embodiment of the invention also provides a method for transmitting satellite messages, and as the principle for solving the problems of the method is similar to the system for transmitting the satellite messages in the system of the embodiment of the invention, the implementation of the method can be referred to the implementation of the system, and repeated parts are not described again.

As shown in fig. 14, a method for transmitting a satellite packet according to a fourteenth embodiment of the present invention includes:

1401, after a satellite server has a satellite message which needs to be sent to a terminal, checking a satellite signal receiving state of the terminal;

step 1402, the satellite server sends a satellite message to the terminal through the wireless mobile communication network after determining that the satellite transmission cannot be performed according to the satellite signal receiving state of the terminal.

Preferably, the satellite server checks the satellite signal receiving state of the terminal, including:

and the satellite server sends a satellite message to the terminal through the satellite after determining that the satellite can transmit the satellite according to the satellite signal receiving state of the terminal.

Preferably, the satellite server receives a satellite signal receiving state of the terminal, including:

the satellite server receives a satellite signal reception state of the terminal through a wireless mobile communication network or a wired network.

Preferably, the satellite server sends the satellite message to the terminal through the wireless mobile communication network, including:

the satellite server sends the satellite message to the wireless mobile communication network through the satellite gateway so that the wireless mobile communication network sends the satellite message to the terminal in one of broadcasting, multicasting and short message.

As shown in fig. 15, a method for transmitting a satellite packet according to the fifteenth embodiment of the present invention includes:

step 1501, determining a satellite signal receiving state by the terminal;

step 1502, the terminal sends the currently determined satellite signal receiving state to the satellite server, so that the satellite server sends a satellite message to the terminal through the wireless mobile communication network after determining that the satellite signal receiving state of the terminal cannot be transmitted through the satellite.

the terminal determines that the satellite signal reception state has changed.

Preferably, the terminal transmits the currently determined satellite signal reception state to the satellite server, including:

and the terminal transmits the currently determined satellite signal receiving state to the satellite server through a wireless mobile communication network or a wired network.

and the terminal packages the information of the currently determined satellite signal receiving state and sends the information serving as user data to the satellite server through a cable network.

the terminal determines each threshold value through preset setting;

the terminal determines each threshold value through a radio resource control protocol RRC signaling;

the terminal determines the threshold values through the access network discovery and selection function ANDSF or OMA-DM.

From the above, it can be seen that:

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for transmitting satellite messages, the method comprising:

2. The method of claim 1, wherein the satellite server viewing the satellite signal reception status of the terminal comprises:

3. The method of claim 1, wherein before the satellite server checks the satellite signal reception status of the terminal, further comprising:

4. The method of claim 3, wherein the satellite server receiving the satellite signal reception status of the terminal comprises:

5. The method according to any one of claims 1 to 4, wherein the satellite server sends the satellite message to the terminal through a wireless mobile communication network, and the method comprises the following steps:

6. A method for transmitting satellite messages, the method comprising:

the satellite signal receiving state determined by the terminal;

7. The method of claim 6, wherein after determining the satellite signal reception state by the terminal and before transmitting the currently determined satellite signal reception state to the satellite server, further comprising:

the terminal determines that the satellite signal receiving state changes.

8. The method of claim 6, wherein the terminal transmitting the currently determined satellite signal reception state to a satellite server, comprises:

9. The method of claim 8, wherein the terminal transmitting the currently determined satellite signal reception state to a satellite server through a wireless mobile communication network, comprises:

10. The method according to any of claims 6 to 9, wherein the satellite signal reception status determined by the terminal comprises:

11. The method of claim 10, wherein the terminal determines the threshold values by one of:

the terminal determines each threshold value through preset setting;

12. A satellite server for transmitting satellite messages, the satellite server comprising:

13. The satellite server according to claim 12, wherein the processing module is specifically configured to:

14. The satellite server of claim 12, wherein the processing module is further to:

15. The satellite server according to claim 14, wherein the transmission module is specifically configured to:

16. The satellite server according to any one of claims 12 to 15, wherein the transmission module is specifically configured to:

17. A terminal for transmitting satellite messages, the method comprising:

18. The terminal of claim 17, wherein the notification module is further configured to:

19. The terminal of claim 17, wherein the notification module is specifically configured to:

20. The terminal of claim 19, wherein the notification module is specifically configured to:

21. The terminal of any one of claims 17 to 20, wherein the determining module is specifically configured to:

22. The terminal of claim 21, wherein the determining module is specifically configured to determine the threshold values by one of the following manners:

determining each threshold value through preset setting;

determining each threshold value through RRC signaling;

23. A system for transmitting satellite messages, the system comprising: