CN109245816B - Link detection method and device - Google Patents
Link detection method and device Download PDFInfo
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- CN109245816B CN109245816B CN201710557685.3A CN201710557685A CN109245816B CN 109245816 B CN109245816 B CN 109245816B CN 201710557685 A CN201710557685 A CN 201710557685A CN 109245816 B CN109245816 B CN 109245816B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Abstract
The embodiment of the invention provides a link detection method and a device, wherein the method comprises the following steps: after receiving a target message sent by a signaling control layer, a service transport layer sends a constructed target data packet to terminal equipment according to a preset period, wherein the target message comprises a wireless signaling bearer establishment message and/or a wireless link detection message, and the wireless link detection message is sent by the signaling control layer aiming at a wireless link out-of-step message reported by a physical layer; judging whether the wireless link is out of step or not according to a response message, wherein the response message is returned by the terminal equipment aiming at the target data packet; and reporting the judgment result aiming at the wireless link desynchronizing to the signaling control layer. Therefore, after the wireless link sent by the physical layer is out of step and the wireless signaling bearer is established between the terminal equipment and the satellite equipment, the service transmission layer detects the wireless link, and the accuracy of detecting the wireless link is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a link detection method and a link detection apparatus.
Background
The satellite communication system is composed of a satellite, a ground station and a user terminal, and because the satellite works on an orbit of hundreds, thousands or even tens of thousands of kilometers, the coverage range of the satellite communication system is far larger than that of a general mobile communication system, and therefore, the satellite communication system can be adopted to realize the wide-range coverage. Correspondingly, frequency points, time slots, power and the like in the satellite communication system are valuable resources, so that the resources occupied inefficiently are released as far as possible.
A set of Radio link (Radio L ink, R L) failure detection mechanism is established in a satellite communication system, namely R L is detected by adopting a physical layer, after a User Radio Bearer (URB) is established between a satellite and a User, R L can be detected to be in a normal state, but when a terminal device carries out special service such as short message service, only a Signaling Radio Bearer (SRB) is established between the satellite and the User, or in an abnormal scene, URB cannot be established, and only SRB is established, because data is not transmitted between the satellite and the User, the detection result of the physical layer to R L is whether R L is out of step, but at the moment, R L may be in a normal state, namely R L is normal, but data is not transmitted really, or data is not transmitted, thus the accuracy of the detection result is low for the condition that only SRB exists between the User and the satellite in the R L detection method in the prior art.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a link detection method to solve the problem of low accuracy of the wireless link detection method in the prior art.
Correspondingly, the embodiment of the invention also provides a link detection device, which is used for ensuring the realization and the application of the method.
In order to solve the above problem, the present invention discloses a link detection method, which is applied to a satellite communication system, and specifically comprises: after receiving a target message sent by a signaling control layer, a service transport layer sends a constructed target data packet to terminal equipment according to a preset period, wherein the target message comprises a wireless signaling bearer establishment message and/or a wireless link detection message, and the wireless link detection message is sent by the signaling control layer aiming at a wireless link out-of-step message reported by a physical layer; judging whether the wireless link is out of step or not according to a response message, wherein the response message is returned by the terminal equipment aiming at the target data packet; and reporting the judgment result aiming at the wireless link desynchronizing to the signaling control layer.
Optionally, the step of determining whether the wireless link is out of synchronization according to the response message includes: judging whether the service transmission layer receives a response message within a first preset time; if the service transmission layer receives a response message within a first preset time, determining that the wireless link is normal; and if the service transmission layer does not receive the response message within the first preset time, determining that the wireless link is out of step.
Optionally, before the step of determining that the wireless link is out of synchronization, the method further comprises: judging whether the number of times of sending the target data packet by the service transmission layer exceeds a threshold value; if the number of times exceeds a threshold value, executing a step of determining that the wireless link is out of step; and if the times do not exceed the threshold value, sending the target data packet to the terminal equipment again, and executing the step of judging whether the service transmission layer receives the response message within the first preset time.
Optionally, before the step of receiving the target message sent by the signaling control layer by the service transport layer, the method further includes: after a signaling control layer receives a wireless link out-of-step message sent by a physical layer, the signaling control layer judges whether only wireless signaling bearing exists between satellite equipment and terminal equipment; if only wireless signaling load bearing exists between the satellite equipment and the terminal equipment, the signaling control layer sends the wireless link detection message to a service transmission layer; if only wireless signaling bearing does not exist between the satellite equipment and the terminal equipment, the signaling control layer determines that the wireless link is out of step and releases corresponding network resources; and/or after the signaling control layer establishes a wireless signaling bearer between the satellite equipment and the terminal equipment, the signaling control layer sends the wireless signaling bearer establishment message to the service transmission layer.
Optionally, after the step of reporting the detection result to the signaling control layer, the method further includes: the signaling control layer judges whether the signaling control layer receives the judgment result within second preset time; if the signaling control layer receives the judgment result in second preset time and the judgment result is that the wireless link is out of step, releasing corresponding network resources; and if the signaling control layer does not receive the judgment result within second preset time, releasing the corresponding network resource.
Optionally, before the step of sending the constructed target data packet to the terminal device according to the preset period, the method further includes: the service transmission layer judges whether the signaling data corresponding to the wireless signaling bearer is successfully sent; if the signaling data is not successfully sent, the service transmission layer retransmits the signaling data; and if the transmission is successful, executing the step of transmitting the constructed target data packet to the terminal equipment according to a preset period.
Optionally, the target data packet is constructed according to a communication protocol corresponding to the satellite communication system.
The invention also discloses a link detection device, which is applied to satellite equipment, and the device comprises: the data sending module is used for sending a constructed target data packet to the terminal equipment according to a preset period after receiving a target message sent by the signaling control layer, wherein the target message comprises a wireless signaling bearer establishment message and/or a wireless link detection message, and the wireless link detection message is sent by the signaling control layer aiming at a wireless link out-of-step message reported by the physical layer; the out-of-step judging module is used for judging whether the wireless link is out of step according to a response message, wherein the response message is returned by the terminal equipment aiming at the target data packet; and the result reporting module is used for reporting the judgment result aiming at the wireless link out-of-step to the signaling control layer.
Optionally, the step-out determining module includes: the message judging submodule is used for judging whether the service transmission layer receives a response message within first preset time; a first determining submodule, configured to determine that the wireless link is normal if the service transport layer receives a response message within a first preset time; and the second determining submodule is used for determining that the wireless link is out of step if the service transmission layer does not receive the response message within the first preset time.
Optionally, the second determining sub-module is further configured to determine whether the number of times that the service transport layer sends the target data packet exceeds a threshold value if the service transport layer does not receive the response message within a first preset time; determining that the wireless link is out of synchronization when the number of times exceeds a threshold; the data sending module is further configured to send the target data packet to the terminal device again when the number of times does not exceed a threshold; the message determining sub-module is specifically configured to determine whether the service transport layer receives a response message within a first preset time after the target data packet is sent to the terminal device again.
Optionally, the apparatus further comprises: the message sending module is used for judging whether only wireless signaling bearing exists between the satellite equipment and the terminal equipment after the signaling control layer receives the wireless link out-of-step message sent by the physical layer; if only wireless signaling load bearing exists between the satellite equipment and the terminal equipment, the wireless link detection message is sent to a service transmission layer; and/or after a wireless signaling bearer is established between the satellite equipment and the terminal equipment, sending the wireless signaling bearer establishment message to the service transmission layer; and the resource release module is used for determining that the wireless link is out of step and releasing corresponding network resources if only wireless signaling load does not exist between the satellite equipment and the terminal equipment.
Optionally, the apparatus further comprises: the result judging module is used for judging whether the signaling control layer receives the judging result within second preset time; a resource releasing module, configured to release a corresponding network resource if the signaling control layer receives the determination result within a second preset time and the determination result is that the wireless link is out of step; the resource releasing module is further configured to release the corresponding network resource if the signaling control layer does not receive the determination result within a second preset time.
Optionally, the apparatus further comprises: the data judgment module is used for judging whether the signaling data corresponding to the wireless signaling bearer is successfully sent; a data retransmission module, configured to retransmit the signaling data by the service transport layer if the signaling data is not successfully sent; the data sending module is specifically configured to send the constructed target data packet to the terminal device according to a preset period if the signaling data is successfully sent.
Optionally, the target data packet is constructed according to a communication protocol corresponding to the satellite communication system.
Compared with the prior art, the embodiment of the invention has the following advantages:
after a wireless signaling bearer is established and/or a wireless link out-of-step message reported by a physical layer is received, a signaling control layer of the embodiment of the invention sends a corresponding target message to a service transmission layer; after receiving a target message sent by a signaling control layer, a service transmission layer sends a target data packet to terminal equipment according to a preset period, then the service transmission layer can receive a response message returned by the terminal equipment aiming at the target data packet, and further judges whether the wireless link is out of step or not according to the response message; then, the judgment of the wireless link loss of step is reported to the signaling control layer, so that the service transmission layer completes the detection of the wireless link. Therefore, after the signaling control layer receives the out-of-step message of the wireless link sent by the physical layer, the service transmission layer can detect the wireless link again, and the detection accuracy is improved; after the terminal device and the satellite device establish the wireless signaling bearer, the service transmission layer can actively detect the wireless link, so that the accuracy of detecting the wireless link is further improved.
Drawings
Fig. 1 is a schematic diagram of a system structure for connecting a terminal device and a satellite device according to the present invention;
FIG. 2 is a flow chart of the steps of one embodiment of a link detection method of the present invention;
FIG. 3 is a flow chart of steps of another link detection method embodiment of the present invention;
FIG. 4 is a schematic diagram of a destination packet header format in accordance with the present invention;
FIG. 5 is a block diagram of a link detection apparatus according to an embodiment of the present invention;
fig. 6 is a block diagram of another embodiment of a link detection apparatus according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
For the convenience of the description of the following embodiments, a satellite communication system is described: the satellite communication system comprises satellite equipment, a ground station and terminal equipment, when one terminal equipment adopts the satellite communication system to communicate with the other terminal equipment, the terminal equipment is connected with the satellite equipment and sends data, and the satellite equipment sends the data sent by the terminal equipment to the other terminal equipment through the ground station. A schematic structural diagram of a system in which a terminal device is connected to a satellite device is shown in fig. 1, where the satellite device includes a communication processing module, and the communication processing module includes: a Core Network (GCN), a short message broadcasting center (CBC), a control center, a Gateway Station Controller (GSC), and a Gateway Transceiver Station (GTS); the service transmission layer and the signaling control layer in the satellite communication network are positioned in the GSC, the service transmission layer is used for transmitting data, and the signaling control layer is used for processing signaling; the physical layer in the satellite communication network is located in the GTS.
Referring to fig. 2, a flowchart illustrating steps of an embodiment of a link detection method according to the present invention is shown, which may specifically include the following steps:
step 201, after receiving the target message sent by the signaling control layer, the service transport layer sends the constructed target data packet to the terminal device according to a preset period.
The service transmission layer of the embodiment of the invention can detect the wireless link under various conditions, wherein in one condition, after the satellite equipment and the terminal equipment establish wireless signaling bearing, the service transmission layer can actively detect the wireless link; in another case, after the physical layer reports the out-of-step message of the wireless link, the service transmission layer can detect the wireless link again in order to reduce the false detection rate of the out-of-step message of the wireless link reported by the physical layer; of course, there is also a case where the service transport layer detects the radio link after determining that the satellite device and the terminal device establish a radio signaling bearer and the radio link reported by the physical layer is out of synchronization. When each of the above situations occurs, the signaling control layer can send a corresponding message to the service transport layer, and for the first situation, the signaling control layer sends a wireless signaling bearer establishment message to the service transport layer; for the second case, the signaling control layer sends a radio link detection message to the service transport layer; and for the third case, the signaling control layer sends a wireless signaling bearer establishment message and a wireless link detection message to the service transport layer. Therefore, the embodiment of the invention can determine the wireless signaling bearer establishment message and/or the wireless link detection message as the target message, and the service transmission layer can determine that the wireless link needs to be detected after receiving the target message sent by the signaling control layer and enter the detection state; that is, the service transport layer sends the constructed target data packet to the terminal device according to a preset period, wherein the preset period can be set to 1 second, for example, according to requirements. In the embodiment of the invention, the target data packet can be constructed in advance, can be a data packet which needs an opposite end to reply a confirmation frame and is used for detecting whether a wireless link is out of step; optionally, the destination data packet may be an empty data packet.
Step 202, judging whether the wireless link is out of step according to the response message; the response message is returned by the terminal equipment aiming at the target data packet.
In the embodiment of the present invention, since the target data packet may be a data packet that requires an opposite end to reply a confirmation frame, after receiving the target data packet sent by the service transport layer, the terminal device may return a corresponding response message to the service transport layer for the target data packet, and then the service transport layer may determine whether the wireless link is out of synchronization according to the response message. In the embodiment of the present invention, the out-of-synchronization of the wireless link refers to that the wireless link between the terminal device and the satellite device is out-of-synchronization.
After detecting the wireless link, the service transmission layer reports the judgment result of the wireless link loss of step to the signaling control layer, so that the signaling control layer performs corresponding processing according to the judgment result. And the judgment result comprises the normal wireless link and the out-of-step wireless link.
To sum up, the signaling control layer of the embodiment of the present invention sends a corresponding target message to the service transport layer after establishing a wireless signaling bearer and/or after receiving a wireless link out-of-step message reported by the physical layer; after receiving a target message sent by a signaling control layer, a service transmission layer sends a target data packet to terminal equipment according to a preset period, then the service transmission layer can receive a response message returned by the terminal equipment aiming at the target data packet, and further judges whether the wireless link is out of step or not according to the response message; then, the judgment of the wireless link loss of step is reported to the signaling control layer, so that the service transmission layer completes the detection of the wireless link. Therefore, after the signaling control layer receives the out-of-step message of the wireless link sent by the physical layer, the service transmission layer can detect the wireless link again, and the detection accuracy is improved; after the terminal device and the satellite device establish the wireless signaling bearer, the service transmission layer can actively detect the wireless link, so that the accuracy of detecting the wireless link is further improved.
In another embodiment of the present invention, the signaling control layer may send different target messages to the service transport layer under different conditions, and after receiving the different target messages, the service transport layer may also have different corresponding processing manners. Correspondingly, when the signaling control layer receives different judgment results of the service transport layer, corresponding processing is also performed according to the different judgment results.
Referring to fig. 3, a flowchart of steps of another embodiment of a link detection method according to the present invention is shown, which may specifically include the following steps:
In the embodiment of the invention, when the terminal equipment carries out various services such as short message service, voice service and the like, connection with the satellite equipment is required to be established, and when any connection is established between the terminal equipment and the satellite equipment, such as SRB established when the short message service is carried out and URB established when the voice service is carried out, the SRB is firstly established so as to establish connection between the terminal equipment and the satellite equipment through various signaling. After receiving a request for establishing connection sent by terminal equipment and responding, a signaling control layer determines that an SRB is established between the terminal equipment and satellite equipment; in order to ensure that when only an SRB exists between the terminal device and the satellite device, whether the radio link is out of step can be detected, the signaling control layer may send a radio signaling bearer setup message to the service transport layer, so that the service transport layer detects the radio link after receiving the radio signaling bearer setup message.
In an example of the present invention, when a terminal device performs a voice service, a URB is established between the terminal device and a satellite device, and when the URB exists between the terminal device and the satellite device, if the URB transmits data normally, a physical layer detects a link between the terminal device and the satellite device, and it is determined that a wireless link between the terminal device and the satellite device is in a normal state; however, when the URB data transmission is abnormal or the terminal device performs the short message service, only the SRB is established between the terminal device and the satellite device, or in other abnormal situations, the terminal device cannot establish the URB, and only the SRB is established, the physical layer can detect the radio link loss of synchronization. No matter the physical layer detects that the wireless link is out of step or the wireless link is normal, the detection result is sent to the signaling control layer. If only SRB exists between the satellite equipment and the terminal equipment, the wireless link out-of-step message sent by the physical layer may be inaccurate; if URB still exists between the satellite equipment and the terminal equipment, the wireless link out-of-step message sent by the physical layer is accurate, so that the signaling control layer can judge whether only SRB exists between the satellite equipment and the terminal equipment after receiving the wireless link out-of-step message sent by the physical layer, and if so, the step 303 is executed; if not, go to step 316.
Step 303, the signaling control layer sends the radio link detection message to the service transport layer.
And when the signaling control layer determines that only the SRB exists between the satellite equipment and the terminal equipment, the wireless link detection message can be sent to the service transmission layer so that the service transmission layer detects the wireless link again.
In the embodiment of the present invention, the target message includes a radio signaling bearer establishment message and/or a radio link detection message, and the service transport layer may receive the radio signaling bearer establishment message and/or the radio link detection message sent by the signaling control layer. Specifically, after receiving the radio signaling bearer setup message sent by the signaling control layer, the service transport layer may determine that the radio link needs to be detected, i.e., execute step 305. When any connection is established between the terminal equipment and the satellite equipment, the SRB is required to be established firstly, so that in general, a service transmission layer receives a wireless signaling bearer establishment message firstly and then receives a wireless link detection message; therefore, when the service transport layer receives the radio link detection message sent by the signaling control layer, it can be determined first whether the service transport layer has received the radio signaling bearer setup message, if yes, the service transport layer performs step 307 with reference to the time when the radio signaling bearer setup message is received; if not, the service transport layer performs step 307 based on the time of receiving the radio link detection message.
Before detecting the radio link, the service transport layer may determine whether signaling data corresponding to the radio signaling bearer is successfully transmitted, if not, perform step 306, and if so, perform step 307, in order to ensure that the signaling data is successfully transmitted.
When the signaling data is determined not to be successfully sent, the service transmission layer retransmits the signaling data; after the signaling data is retransmitted, step 305 is executed again to determine whether the signaling data is retransmitted successfully.
And 307, the service transmission layer sends the constructed target data packet to the terminal equipment according to a preset period.
In one example of the present invention, as shown in fig. 4, fig. 4 shows a format schematic diagram of a target Data packet header of the present invention, and in fig. 4, each row shows Data carried by bits of one byte, namely Octet1, Octet2, Octet3, and Octet4 respectively show a first byte, a second byte, a third byte, and a fourth byte, wherein Payload Type is Data packet Type, UUG is unsolicited uplink grant, UUG is set to 1, which indicates that the terminal needs to acknowledge back a Data packet, RBSN: block sequence number, RBSN: 6-2 indicates that a first bit of a packet is a first byte, SDU: unsolicited uplink grant, and SDU: compressed SDU Payload length is a second byte, SDU (6-2) indicates that a Data packet header of a second byte, SDU (6-2) indicates that a last bit of a compressed packet is a second byte, SDU-2 bit of a second byte, SDU-Payload Type is a second byte, and SDU-5 is a Reduced SDU-bit Size, which indicates that a last bit of a compressed SDU (RBSN) is a compressed SDU-2-bit of a Reduced SDU-bit-Size, wherein the last bit of a Reduced SDU-5 is a Reduced SDU-5, SDU-5, a Reduced bit-5-2-one bit of a Reduced bit-Size, which indicates that a Reduced Data packet header of a Reduced Data packet, a Reduced bit-5-bit-0, and a Reduced bit-bit.
In another embodiment of the present invention, after receiving the target data packet, the terminal device sends a confirmation frame, i.e., a response message, to the target data packet, and if the wireless link between the terminal device and the satellite device is normal, the response message can be successfully sent to the service transport layer; if the wireless link between the terminal equipment and the satellite equipment is out of step, the response message cannot be successfully sent to a service transmission layer; therefore, the step of the service transport layer determining whether the wireless link is out of synchronization according to the response message is as follows:
Therefore, the service transport layer may determine whether it receives the response message within a first preset time, where the first preset time is determined as 1 second as required, and if the service transport layer receives the response message within the first preset time, execute step 309; if the service transport layer does not receive the response message within the first preset time, step 310 is executed.
Step 309, the service transmission layer determines that the wireless link is normal.
And when the service transmission layer is determined to receive the response message in the first preset time, determining that the wireless link is normal.
In order to improve the accuracy of wireless link detection, the service transmission layer can repeatedly send the target data packet to the terminal equipment, and after the target data packet is repeatedly sent, whether the wireless link is out of step is determined according to whether the service transmission layer receives the response message. Specifically, when it is determined that the service transport layer does not receive the response message within the first preset time, the service transport layer may determine whether the number of times of sending the target data packet by the service transport layer exceeds a threshold, if yes, execute step 311; if not, go to step 317. Wherein the threshold value can be determined according to the requirement, such as 3 times.
Step 311, the service transport layer determines that the wireless link is out of synchronization.
When the service transmission layer determines that the number of times of sending the target data packet exceeds the threshold value, namely the service transmission layer sends the target data packet to the terminal equipment for many times, no response message is received, and at the moment, the service transmission layer can determine that the wireless link is out of step.
And after the service transmission layer finishes judging the desynchronization of the wireless link, reporting the judgment result to the signaling control layer, and then carrying out corresponding processing by the signaling control layer according to the judgment result.
After the service transmission layer reports the judgment result, the signaling control layer may or may not receive the judgment result; therefore, the signaling control layer may determine the corresponding processing operation according to whether it receives the determination result within the second preset time. That is, the signaling control layer determines whether it receives the determination result within a second preset time, if yes, step 314 is executed; if not, go to step 316. Wherein the second preset time can be set as 2 seconds as required.
If the signaling control layer receives the judgment result within the second preset time, the signaling control layer can determine the processing operation to be executed according to the judgment result; specifically, it is determined whether the determination result is that the wireless link is out of step, and if the determination result is that the wireless link is out of step, it is determined that the wireless link is abnormal, then step 316 is executed; if the judgment result is not that the wireless link is out of step, it is determined that the wireless link is normal, and step 315 is executed.
Step 315, the signaling control layer maintains the connection of the wireless link between the satellite device and the terminal device.
And when the signaling control layer determines that the wireless link is normal, the connection of the wireless link between the satellite equipment and the terminal equipment is maintained without any processing aiming at the wireless link.
When the signaling control layer determines that the wireless link is out of step, the network resource corresponding to the wireless link can be released so as to save the network resource in the satellite communication system. In the embodiment of the invention, under various conditions, the signaling control layer can determine that the wireless link is out of step; in one case, after receiving the radio link out-of-step message sent by the physical layer, the signaling control layer determines that a URB still exists between the satellite device and the terminal device, that is, when it is determined that not only an SRB exists between the terminal device and the satellite device, it may determine that the radio link is out-of-step. In another case, the signaling control layer may determine that the wireless link is out of synchronization when the signaling control layer does not receive the determination result within the second preset time. In another case, the signaling receives the judgment result within the second preset time, and the judgment result is that the wireless link is out of step, the wireless link is determined to be out of step.
Step 317, the service transmission layer sends the target data packet to the terminal device again.
When it is determined that the number of times that the service transport layer sends the target data packet does not exceed the threshold, the service transport layer sends the target data packet to the terminal device again, and then step 308 is executed.
In the embodiment of the invention, after determining that the service transmission layer does not receive the response message within the first preset time, judging whether the frequency of sending the target data packet by the service layer exceeds a threshold value, if so, determining that the wireless link is out of step, if not, sending the target data packet to the terminal equipment again, and judging that the service transmission layer does not receive the response message within the first preset time; that is, after the service transport layer sends the target data packet for many times, the service transport layer determines that the wireless link is out of step when no response message is received, so that the accuracy of wireless link detection is further improved. In addition, before the service transport layer sends the target data packet, if the signaling data corresponding to the SRB is successfully sent, the service transport layer retransmits the signaling data to ensure the successful transmission of the signaling data. The target data packet is constructed according to the current satellite communication protocol, other protocols do not need to be introduced, and the detection efficiency of the wireless link is improved.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 5, a block diagram of a link detection apparatus according to an embodiment of the present invention is shown, where the apparatus includes: a data sending module 501, an out-of-step judging module 502 and a result reporting module 503, wherein,
a data sending module 501, configured to send a constructed target data packet to a terminal device according to a preset period after receiving a target message sent by a signaling control layer, where the target message includes a wireless signaling bearer establishment message and/or a wireless link detection message, and the wireless link detection message is sent by the signaling control layer for a wireless link out-of-step message reported by a physical layer;
an out-of-step determining module 502, configured to determine whether the wireless link is out-of-step according to a response message, where the response message is returned by the terminal device for the target data packet;
a result reporting module 503, configured to report the result of determining that the wireless link is out of synchronization to the signaling control layer.
Referring to fig. 6, a block diagram of another embodiment of the link detection apparatus of the present invention is shown; in another embodiment of the present invention, the apparatus further comprises: a message sending module 504, a resource releasing module 505, a result judging module 506, a data judging module 507 and a data retransmitting module 508, wherein,
a message sending module 504, configured to determine whether only a wireless signaling bearer exists between the satellite device and the terminal device after the signaling control layer receives the wireless link out-of-step message sent by the physical layer; if only wireless signaling load bearing exists between the satellite equipment and the terminal equipment, the wireless link detection message is sent to a service transmission layer; and/or after a wireless signaling bearer is established between the satellite equipment and the terminal equipment, sending the wireless signaling bearer establishment message to the service transmission layer.
A resource releasing module 505, configured to determine that the wireless link is out of synchronization and release the corresponding network resource if only the wireless signaling bearer does not exist between the satellite device and the terminal device.
A result determining module 506, configured to determine whether the signaling control layer receives the determination result within a second preset time.
A data determining module 507, configured to determine whether signaling data corresponding to the radio signaling bearer is successfully sent.
A data retransmission module 508, configured to retransmit the signaling data by the service transport layer if the signaling data is not successfully sent.
In another embodiment of the present invention, the resource releasing module 505 is configured to release the corresponding network resource if the signaling control layer receives the determination result within a second preset time and the determination result is that the wireless link is out of step; and the signaling control layer is also used for releasing the corresponding network resource if the signaling control layer does not receive the judgment result within a second preset time.
In another embodiment of the present invention, the out-of-step determining module 502 includes: a message decision sub-module 5021, a first determination sub-module 5022, and a second determination sub-module 5023, wherein,
the message determining submodule 5021 is configured to determine whether the service transport layer receives a response message within a first preset time;
the first determining submodule 5022 is configured to determine that the wireless link is normal if the service transport layer receives a response message within a first preset time;
a second determining submodule 5023, configured to determine that the wireless link is out of step if the service transport layer does not receive the response message within a first preset time; the second determining sub-module 5023 is further configured to determine whether the number of times that the service transport layer sends the target data packet exceeds a threshold value if the service transport layer does not receive the response message within a first preset time; determining that the wireless link is out of synchronization when the number of times exceeds a threshold.
The message determining sub-module 5021 is specifically configured to determine whether the service transport layer receives a response message within a first preset time after the target data packet is sent to the terminal device again.
In the embodiment of the present invention, the data sending module 501 is specifically configured to send the constructed target data packet to the terminal device according to a preset period if the signaling data is successfully sent; the data sending module 501 is further configured to send the target data packet to the terminal device again when the number of times does not exceed the threshold; wherein the target data packet is constructed according to a communication protocol corresponding to the satellite communication system.
After a wireless signaling bearer is established and/or a wireless link out-of-step message reported by a physical layer is received, a signaling control layer of the embodiment of the invention sends a corresponding target message to a service transmission layer; after receiving a target message sent by a signaling control layer, a service transmission layer sends a target data packet to terminal equipment according to a preset period, then the service transmission layer can receive a response message returned by the terminal equipment aiming at the target data packet, and further judges whether the wireless link is out of step or not according to the response message; then, the judgment of the wireless link loss of step is reported to the signaling control layer, so that the service transmission layer completes the detection of the wireless link. Therefore, after the signaling control layer receives the out-of-step message of the wireless link sent by the physical layer, the service transmission layer can detect the wireless link again, and the detection accuracy is improved; after the terminal device and the satellite device establish the wireless signaling bearer, the service transmission layer can actively detect the wireless link, so that the accuracy of detecting the wireless link is further improved.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of 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, embodiments of 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.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (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 terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, 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 terminal 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 terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal 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 of these 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 embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above detailed description is provided for a link detection method and a link detection apparatus provided by the present invention, and the principle and the implementation of the present invention are explained in the present document by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (12)
1. A link detection method, for use in a satellite communication system, the method comprising:
after a signaling control layer receives a wireless link out-of-step message sent by a physical layer, the signaling control layer judges whether only wireless signaling bearing exists between satellite equipment and terminal equipment; if only wireless signaling load bearing exists between the satellite equipment and the terminal equipment, the signaling control layer sends the wireless link detection message to a service transmission layer; if only wireless signaling bearing does not exist between the satellite equipment and the terminal equipment, the signaling control layer determines that the wireless link is out of step and releases corresponding network resources;
and/or the presence of a gas in the gas,
after a signaling control layer establishes a wireless signaling bearer between satellite equipment and terminal equipment, sending a wireless signaling bearer establishment message to a service transmission layer;
after receiving a target message sent by a signaling control layer, a service transport layer sends a constructed target data packet to terminal equipment according to a preset period, wherein the target message comprises a wireless signaling bearer establishment message and/or a wireless link detection message, and the wireless link detection message is sent by the signaling control layer aiming at a wireless link out-of-step message reported by a physical layer;
judging whether the wireless link is out of step or not according to a response message, wherein the response message is returned by the terminal equipment aiming at the target data packet;
and reporting the judgment result aiming at the wireless link desynchronizing to the signaling control layer.
2. The method of claim 1, wherein the step of determining whether the wireless link is out of synchronization based on the response message comprises:
judging whether the service transmission layer receives a response message within a first preset time;
if the service transmission layer receives a response message within a first preset time, determining that the wireless link is normal;
and if the service transmission layer does not receive the response message within the first preset time, determining that the wireless link is out of step.
3. The method of claim 2, further comprising, prior to the step of determining that the wireless link is out of synchronization:
judging whether the number of times of sending the target data packet by the service transmission layer exceeds a threshold value;
if the number of times exceeds a threshold value, executing a step of determining that the wireless link is out of step;
and if the times do not exceed the threshold value, sending the target data packet to the terminal equipment again, and executing the step of judging whether the service transmission layer receives the response message within the first preset time.
4. The method of claim 1, wherein after the step of reporting the determination result for out-of-synchronization of the radio link to the signaling control layer, the method further comprises:
the signaling control layer judges whether the signaling control layer receives the judgment result within second preset time;
if the signaling control layer receives the judgment result in second preset time and the judgment result is that the wireless link is out of step, releasing corresponding network resources;
and if the signaling control layer does not receive the judgment result within second preset time, releasing the corresponding network resource.
5. The method according to claim 1, wherein before the step of transmitting the constructed target packet to the terminal device according to the preset period, the method further comprises:
the service transmission layer judges whether the signaling data corresponding to the wireless signaling bearer is successfully sent;
if the signaling data is not successfully sent, the service transmission layer retransmits the signaling data;
and if the transmission is successful, executing the step of transmitting the constructed target data packet to the terminal equipment according to a preset period.
6. The method of any of claims 1-5, wherein the destination data packet is constructed according to a communication protocol corresponding to the satellite communication system.
7. A link detection apparatus, for use in a satellite device, the apparatus comprising:
the data sending module is used for sending a constructed target data packet to the terminal equipment according to a preset period after receiving a target message sent by the signaling control layer, wherein the target message comprises a wireless signaling bearer establishment message and/or a wireless link detection message, and the wireless link detection message is sent by the signaling control layer aiming at a wireless link out-of-step message reported by the physical layer;
the out-of-step judging module is used for judging whether the wireless link is out of step according to a response message, wherein the response message is returned by the terminal equipment aiming at the target data packet;
a result reporting module, configured to report a determination result for out-of-step of the wireless link to the signaling control layer;
the message sending module is used for judging whether only wireless signaling bearing exists between the satellite equipment and the terminal equipment after the signaling control layer receives the wireless link out-of-step message sent by the physical layer; if only wireless signaling load bearing exists between the satellite equipment and the terminal equipment, the wireless link detection message is sent to a service transmission layer; and/or after a wireless signaling bearer is established between the satellite equipment and the terminal equipment, sending the wireless signaling bearer establishment message to a service transmission layer;
and the resource release module is used for determining that the wireless link is out of step and releasing corresponding network resources if only wireless signaling load does not exist between the satellite equipment and the terminal equipment.
8. The apparatus of claim 7, wherein the out-of-synchronization determining module comprises:
the message judging submodule is used for judging whether the service transmission layer receives a response message within first preset time;
a first determining submodule, configured to determine that the wireless link is normal if the service transport layer receives a response message within a first preset time;
and the second determining submodule is used for determining that the wireless link is out of step if the service transmission layer does not receive the response message within the first preset time.
9. The apparatus of claim 8,
the second determining submodule is further configured to determine whether the number of times that the service transport layer sends the target data packet exceeds a threshold value if the service transport layer does not receive the response message within a first preset time; determining that the wireless link is out of synchronization when the number of times exceeds a threshold;
the data sending module is further configured to send the target data packet to the terminal device again when the number of times does not exceed a threshold;
the message determining sub-module is specifically configured to determine whether the service transport layer receives a response message within a first preset time after the target data packet is sent to the terminal device again.
10. The apparatus of claim 7, further comprising:
the result judging module is used for judging whether the signaling control layer receives the judging result within second preset time;
a resource releasing module, configured to release a corresponding network resource if the signaling control layer receives the determination result within a second preset time and the determination result is that the wireless link is out of step;
the resource releasing module is further configured to release the corresponding network resource if the signaling control layer does not receive the determination result within a second preset time.
11. The apparatus of claim 7, further comprising:
the data judgment module is used for judging whether the signaling data corresponding to the wireless signaling bearer is successfully sent;
a data retransmission module, configured to retransmit the signaling data by the service transport layer if the signaling data is not successfully sent;
the data sending module is specifically configured to send the constructed target data packet to the terminal device according to a preset period if the signaling data is successfully sent.
12. The apparatus of any of claims 7-11, wherein the destination data packet is constructed according to a communication protocol corresponding to the satellite communication system.
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| AU2007248806A1 (en) * | 2006-05-05 | 2007-11-15 | Interdigital Technology Corporation | Radio link failure detection procedures in long term evolution uplink and downlink and apparatus therefor |
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