CN106412859B - A method and terminal for automatically resending a short message - Google Patents

Abstract

The present invention provides a method and terminal for automatically resending a short message, wherein the method for automatically resending a short message includes: sending a short message to the network side, and waiting for a sending report fed back by the network side within a preset time period; , if the wireless link is released, the short message will be resent after the wireless link is restored. In the solution provided by the present invention, if the wireless link is released during the process of waiting for the sending report fed back by the network side within a preset time period after sending the short message, after the wireless link is restored, the short message will be automatically re-sent, and there is no need to wait any longer. When the time limit of the timer expires, the delay time of retransmission of the short message is greatly shortened, and the user experience is improved.

Description

A method and terminal for automatically resending a short message

technical field

The present invention relates to the field of wireless technology, in particular to a method and a terminal for automatically resending a short message.

Background technique

The sending and retransmission of short messages in the prior art are introduced as follows:

1. SMS sending mechanism of circuit domain fallback (CSFB) mobile phone

LTE (Long Term Evolution), as a follow-up evolution technology of 3G, is recognized by the industry as the evolution direction of next-generation mobile communications due to its unique technical advantages such as high data rate, low latency, and flexible bandwidth configuration. In the 2/3G era, the short message service is carried in the circuit domain, while LTE only has the packet domain and no circuit domain. To continue to support short messages, special solutions are required. CSFB mobile phone short messages adopt the SMS over SGs (the short message SMS is transmitted through the interface SGs between the mobile switching center and the mobility management entity). , and the routing and delivery of short messages are implemented by the circuit domain.

Among them, the short message service protocol stack is shown in Figure 1, which can be divided into SM-AL (Short Message Application Layer, short message application layer), SM-TL (Short Message Transfer Layer, short message transmission layer), SM-RL (Short Message Relay Layer, SMS relay layer), CM sublayer (Connection Management sublayer, connection management sublayer), AS layer (access layer). The short message compiled by the terminal is encapsulated as relay layer data signaling (RP-Data) at the SM-RL layer, and then encapsulated as control layer data signaling (CP-Data) at the CM sublayer layer. MSC is mobile exchange, MS is mobile terminal, SMR is short message relay, SMC is short message connection management, SM-RP protocol is short message relay protocol, SM-CP protocol is short message connection management protocol, and SMS is (Short Message) short message.

The business process of the SMS over SGs solution can be divided into two cases: MO (Mobile Originating, mobile terminal initiation) and MT (Mobile Terminating, mobile terminal receiving). The MO SMS process is shown in Figure 2, where EPS/IMSIattach procedure is EPS /IMSI attach process, UE triggered Service Request is the service request triggered by the terminal, Uplink NAS Transport is the uplink NAS direct transmission, NAS is the non-access stratum, Uplink Unitdata is the uplink unit data, Forward Short Message is the forwarding of short messages, and Message transfer is the message Forwarding, Deliveryreport is the sending report, Downlink Unitdata is the downlink unit data, Downlink NAS Transport is the downlink NAS direct transmission, Release Request is the release request, HLR/HSS is the home location register/home user server; SMS-IWMSC is the short message service interworking mobile Switching center, SC is short message center, MSC/VLR is mobile exchange/visited location register, MME is mobility management entity.

Corresponding to Figure 2, the complete process when the terminal is in an idle state is as follows:

21. The terminal completes the joint EPS/IMSI attach process.

22. The terminal initiates a short message service request.

23. The short message prepared by the terminal is encapsulated as RP-Data at the SM-RL layer, then encapsulated as CP-Data at the CM sublayer layer, and finally encapsulated in a non-access stratum (NAS) message and sent to the MME.

24. The MME sends an Uplink Unitdata (Uplink Unitdata) message to the MSC/VLR, and delivers the short message to the MSC/VLR.

24a. The MSC/VLR sends a downlink unit data (Downlink Unitdata) message to confirm the receipt of the short message to the terminal.

25-28. The short message is sent to the short message center for processing, and a sending report is returned. The sending report is encapsulated in the SM-RL layer as a relay layer correct response signaling (RP-Ack).

29. The MSC/VLR forwards the received transmission report to the MME.

210. The MME encapsulates the sending report into a NAS message, and sends it to the terminal.

211-212, the terminal confirms the receipt of the sending report to the MSC/VLR.

213. The MSC/VLR sends a release request message to the MME, informing that the sending of the short message is completed.

The trigger point for the terminal to display that the SMS has been successfully sent is step 210. When the terminal receives the CP-Data (encapsulated RP-Ack), that is, the Delivery Report, sent by the SMS center, the terminal will display the message only after the terminal receives the RP-ACK. SMS sent successfully. After the terminal sends the SMS CP-Data (encapsulated RP-Data) in step 3, it will start a timer of about 45 seconds at the SM-RL layer, waiting to receive the CP-Data (encapsulated RP-Ack) sent by the SMS center. If the timer expires and the RP-Ack has not been received, the terminal starts automatic retransmission.

2. LTE inter-system redirection

The LTE network needs to interoperate with 2G and 3G to solve the needs of insufficient LTE network coverage, unsupported initial services, and load balancing between networks. When the LTE terminal is in the connected state, it can access the 3G network through redirection: the network side indicates target network information, such as frequency points, to the terminal, and the terminal accesses the target network with the help of the network.

The LTE to 3G redirection signaling process is shown in Figure 3, where RRC Connection Reconfiguration (MeasConfig) is the RRC connection reconfiguration (carries the measurement configuration), Measurement Report is the measurement report, and Redirect to EUTRAN determined by NW is determined by the network. Directed to EUTRAN, RRC ConnectionRelease (RedirectedCarrierInfo) is RRC connection release (carries redirected frequency information), 4G to 3Greselection procedure is 4G to 3G cell reselection procedure, S1Release is S1 interface release, Servicerequest is service request, RAB Assignment Request For the RAB assignment request, the RAB Assignment Response is the RAB assignment response, the Update PDP Request is the update PDP context request, and the Update PDP Response is the update PDP context response;

RAB is a wireless access bearer, PDP is a packet data protocol, GnGp SGSN is a serving GPRS support node based on Gn interface and Gp interface, Serving Gw is a serving gateway, PDN GW is a packet data gateway, HSS is a home user server, and RNC is a wireless The network controller, the UE is the user equipment, and the eNodeB is the base station.

The specific steps are described as follows:

31. The eNodeB sends a measurement control, that is, an RRC Connection Reconfiguration message (carrying a configuration of measurement events of different systems) to the UE;

32. When the measured signal quality meets the inter-system event threshold, the UE sends an inter-system measurement report to the eNodeB;

33. The eNodeB makes a redirection decision and sends an RRC connectionRelease message carrying redirection information to the UE;

34-316, 4G to 3G cell reselection process;

317. The eNodeB sends a UE Context Release Request message to the MME; the MME sends a UE Context Release Command message to the eNodeB to release the S1 connection; the eNodeB returns the UE Context Release Complete, and the S1 connection is released successfully;

318. The UE sends a service request to the GnGp SGSN;

319a, the GnGp SGSN sends a RAB assignment request to the RNC;

319b, the RNC feeds back the RAB assignment response to the GnGp SGSN;

320a, the GnGp SGSN sends an update PDP context request to the PDN GW;

320b, the PDN GW feeds back the update PDP context response to the GnGp SGSN.

In addition, it is well known that in some abnormal scenarios, the terminal cannot receive the RP-Ack, resulting in re-sending the text message:

Scenario 1, the above redirection scenario, such as the redirection scenario from LTE to 3G/2G, occurs immediately after the LTE terminal sends the SMS control layer data signaling CP-Data (encapsulation relay layer data signaling RP-Data). During 3G/2G redirection, the network cannot deliver the RP-Ack to the terminal. Specifically, during the redirection process, the terminal receives the RRCconnection Release message sent by the eNB to release the RRC connection and access the 3G/2G network. The MSC that transfers the SMS does not know the RAT change, and receives the downlink message (RP-Ack) from the SMSC and sends it to the MME, but the MME releases the connection due to the redirection process. terminal, as shown in Figure 4. For the redirection between base stations in the LTE system, there is a similar situation. Due to the RRC connection release, the MME cannot deliver the RP-Ack to the terminal.

Scenario 2, off-network scenario, when the LTE terminal sends the short message CP-Data (encapsulated with RP-Data) and immediately goes off the network, the RRC connection is automatically released, as shown in Figure 4, because the terminal and the network lose connection, the network cannot -Ack is sent to the terminal.

For these abnormal scenarios, the current implementation solution in the industry is that after the terminal sends SMS CP-Data (encapsulating RP-Data), it will start a timer of about 45 seconds at the SM-RL layer, waiting to receive the CP-Data sent by the SMS center. Data (encapsulation relay layer correct response signaling RP-Ack), if the timer expires and the RP-Ack has not been received, the terminal will start automatic retransmission, resulting in a long delay in sending the short message, and the user needs to wait for one minute or The above text messages can only be sent (the screen of the mobile phone shows the message is being sent).

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method and terminal for automatically resending a short message, which solves the problem of a long delay time for the terminal to send a short message in the scenario where the network side cannot send a transmission report due to the release of the wireless link in the prior art.

In order to solve the above technical problems, an embodiment of the present invention provides a method for automatically resending a short message, including:

Send a short message to the network side, and wait for the sending report fed back by the network side within a preset time period;

During the waiting process, if the wireless link is released, the short message will be resent after the wireless link is restored.

Optionally, the step of sending a short message to the network side and waiting for a sending report fed back by the network side within a preset time period includes:

After the short message is encapsulated into relay layer data signaling through the SMS relay layer, it is then encapsulated into the control layer data signaling through the connection management sublayer, and finally encapsulated into the non-access layer message through the access layer and sent to the network side;

A timer that waits for the correct response signaling of the relay layer fed back by the network side is started through the short message relay layer.

Optionally, in the process of waiting, if the wireless link is released, after the wireless link is restored, the step of resending the short message includes:

During the waiting process, if the preset conditions for the release of the wireless link are met, the wireless link is released through the access layer, and whether the wireless link is recovered in real time is detected;

When the test result is yes, resend the text message.

Optionally, during the waiting process, if a preset condition for releasing the wireless link is satisfied, the step of releasing the wireless link through the access layer includes:

During the waiting process, if the signal strength value of the local cell is less than or equal to the preset value, the wireless link is released through the access layer.

Optionally, during the waiting process, if the signal strength value of the local cell is less than or equal to the preset value, the step of releasing the radio link through the access layer includes:

During the waiting process, if the signal strength value of the local cell is smaller than the signal strength value of the neighboring system or neighboring cell, the access layer reports the measurement report of the different system or the different frequency to the base station, so that the base station decides to redirect;

The radio resource control connection release instruction issued by the base station according to the measurement report is received by the access layer, and the radio link is released according to the radio resource control connection release instruction.

Optionally, during the waiting process, if the signal strength value of the local cell is less than or equal to the preset value, the step of releasing the radio link through the access layer includes:

During the waiting process, if the signal strength value of the local cell is equal to zero, the wireless link is automatically released through the access layer.

Optionally, the step of detecting whether the wireless link is recovered in real time is specifically:

Detect in real time whether a cell that meets the conditions is found and the camping is successful.

Optionally, after the wireless link is released, and before the wireless link is restored, the method further includes:

Stop waiting for the sending report fed back by the network side.

Optionally, the step of stopping waiting for the sending report fed back by the network side includes:

Generate a radio link release notification through the access layer;

The short message relay layer stops waiting for the sending report fed back by the network side according to the wireless link release notification.

Optionally, after the wireless link is restored, the step of resending the short message includes:

After the radio link is restored, a radio link restoration notification is generated through the access layer;

The short message is resent by the short message relay layer according to the wireless link recovery notification.

The present invention also provides a terminal, comprising:

The short message sending module is used to send short messages to the network side and wait for the sending report fed back by the network side within a preset time period;

The short message retransmission module is used to resend the short message after the wireless link is recovered if the wireless link is released during the waiting process.

Optionally, the short message sending module includes:

The first processing submodule is used to encapsulate the short message into the relay layer data signaling through the short message relay layer, then encapsulate it into the control layer data signaling through the connection management sublayer, and finally encapsulate it into the non-access layer through the access layer. The message is sent to the network side;

The starter submodule is used to start the timer of the relay layer's correct response signaling that is fed back by the network side through the short message relay layer.

Optionally, the short message retransmission module includes:

The second processing submodule is configured to release the wireless link through the access layer if the preset condition for releasing the wireless link is satisfied during the waiting process, and detect whether the wireless link is recovered in real time;

The first resending submodule is used to resend the short message when the detection result is yes.

Optionally, the second processing submodule includes:

The third processing submodule is configured to release the wireless link through the access layer if the signal strength value of the local cell is less than or equal to the preset value during the waiting process.

Optionally, the third processing submodule includes:

The reporting sub-module is used to report the measurement report of the different system or the different frequency to the base station through the access layer if the signal strength value of the local cell is less than the signal strength value of the neighboring system or the neighboring cell during the waiting process, so that all The base station decides to redirect;

The receiving and releasing sub-module is configured to receive, through the access layer, the radio resource control connection release instruction issued by the base station according to the measurement report, and release the radio link according to the radio resource control connection release instruction.

Optionally, the third processing submodule includes:

The automatic release sub-module is used to automatically release the wireless link through the access layer if the signal strength value of the local cell is equal to zero during the waiting process.

Optionally, the second processing submodule is specifically used for:

Detect in real time whether a cell that meets the conditions is found and the camping is successful.

Optionally, the short message retransmission module is further configured to stop waiting for the sending report fed back by the network side before the wireless link is recovered after the wireless link is released.

Optionally, the short message retransmission module includes:

a first generating submodule, configured to generate a radio link release notification through the access layer;

The stop sub-module is configured to stop waiting for the sending report fed back by the network side according to the wireless link release notification through the short message relay layer.

Optionally, the short message retransmission module includes:

The second generating submodule is configured to generate a wireless link recovery notification through the access layer after the wireless link is recovered;

The second resending submodule is configured to resend the short message through the short message relay layer according to the wireless link recovery notification.

The beneficial effects of the above-mentioned technical solutions of the present invention are as follows:

In the above solution, the method for automatically resending a short message is that after the short message is sent, in the process of waiting for the sending report fed back by the network side within a preset time period, if the wireless link is released, after the wireless link is restored, the automatic When resending a short message, there is no need to wait for the timer to expire, which greatly shortens the delay time for resending short messages and improves user experience.

Description of drawings

1 is a schematic diagram of a short message service protocol stack in the prior art;

Fig. 2 is the MO SMS flow diagram of the prior art;

Fig. 3 is a schematic diagram of a prior art LTE to 3G redirection signaling flow;

4 is a schematic diagram of a scenario in which an LTE terminal in the prior art cannot receive an RP-Ack;

5 is a schematic flowchart of a method for automatically resending a short message according to Embodiment 1 of the present invention;

6 is a schematic flowchart of a method for automatically resending a short message according to Embodiment 2 of the present invention;

7 is a schematic flowchart of a method for automatically resending a short message according to Embodiment 3 of the present invention;

FIG. 8 is a schematic structural diagram of a terminal according to Embodiment 4 of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

The present invention provides a variety of solutions for the problem that the delay time for the terminal to send a short message is relatively long under the scenario that the network side cannot issue a transmission report due to the release of the wireless link in the prior art, and the details are as follows:

Example 1

As shown in FIG. 5 , the method for automatically resending a short message in Embodiment 1 of the present invention includes:

Step 51: Send a short message to the network side, and wait for a sending report fed back by the network side within a preset time period;

Step 52: During the waiting process, if the wireless link is released, the short message is resent after the wireless link is recovered.

The method for automatically resending a short message provided by the first embodiment of the present invention is that after the short message is sent, in the process of waiting for the sending report fed back by the network side within a preset time period, if the wireless link is released, the wireless link is restored when the wireless link is restored. After the message is sent, the short message is automatically resent, and there is no need to wait for the timing of the timer to end, which greatly shortens the delay time for resending the short message and improves the user experience.

Wherein, "in the process of waiting" indicates that the timer set for receiving the transmission report fed back by the network side has not timed out.

Specifically, the step of sending a short message to the network side and waiting for a sending report fed back by the network side within a preset time period includes: after encapsulating the short message into relay layer data signaling through the short message relay layer, and then using the connection management The sublayer is encapsulated into control layer data signaling, and finally encapsulated into a non-access layer message through the access layer and sent to the network side; the short message relay layer starts a timer that waits for the correct response signaling of the relay layer fed back by the network side.

Wherein, if the wireless link is released during the waiting process, after the wireless link is restored, the step of resending the short message includes: during the waiting process, if the preset conditions for releasing the wireless link are satisfied, then Release the wireless link through the access layer, and detect whether the wireless link is recovered in real time; when the detection result is yes, re-send the short message.

Specifically, during the waiting process, if the preset conditions for releasing the radio link are met, the step of releasing the wireless link through the access layer includes: during the waiting process, if the signal strength value of the local cell is less than or equal to If it is equal to the preset value, the wireless link is released through the access layer.

Corresponding to the situation of redirection, in the waiting process, if the signal strength value of the local cell is less than or equal to the preset value, the step of releasing the wireless link through the access layer includes: in the waiting process, if the local cell If the signal strength value of the cell is smaller than the signal strength value of the adjacent system or adjacent cell, the measurement report of the different system or frequency is reported to the base station through the access layer, so that the base station decides to redirect; the base station receives the base station through the access layer. Release the radio link according to the radio resource control connection release instruction issued according to the measurement report, and release the radio link according to the radio resource control connection release instruction.

Corresponding to the case of disconnection, in the waiting process, if the signal strength value of the local cell is less than or equal to the preset value, the step of releasing the wireless link through the access layer includes: in the waiting process, if the local cell is If the signal strength value of the cell is equal to zero, the wireless link is automatically released through the access layer.

The step of detecting whether the wireless link is recovered in real time is specifically: detecting in real time whether a cell that satisfies the conditions is searched and the camping is successful.

Specifically, the step of resending the short message after the wireless link is restored includes: after the wireless link is restored, generating a wireless link recovery notification through the access layer; and using the short message relay layer according to the wireless link recovery notification Resend the text message.

Embodiment 2

As shown in FIG. 6 , the method for automatically resending a short message in Embodiment 2 of the present invention includes:

Step 61: Send a short message to the network side, and wait for a sending report fed back by the network side within a preset time period;

Step 62: During the waiting process, if the wireless link is released, stop waiting for the sending report fed back by the network side, and resend the short message after the wireless link is restored.

The method for automatically resending a short message provided by the second embodiment of the present invention stops waiting for the network side feedback if the wireless link is released during the process of waiting for the sending report fed back by the network side within a preset time period after sending the short message After the wireless link is restored, it will automatically resend the short message without waiting for the timer to expire, which greatly shortens the delay time of the short message resending, and avoids the occurrence of the timer timeout again after the wireless link is restored. In the case of repeatedly sending short messages, the high-quality requirements of users are met, and the user experience is improved.

Specifically, the step of stopping waiting for the transmission report fed back by the network side includes: generating a radio link release notification through the access layer; and stopping waiting for the transmission report fed back by the network side through the short message relay layer according to the radio link release notification.

In the solution of the second embodiment of the present invention, the other steps except "stop waiting for the sending report fed back by the network side" may adopt the implementation embodiment consistent with the first embodiment.

Embodiment 3

As shown in FIG. 7 , the method for automatically resending a short message in Embodiment 3 of the present invention includes:

Step 71: After the SM-RL layer of the terminal encapsulates the short message in RP-Data, it is sent to the CM-sublayer layer by the bottom layer, and a timer waiting for RP-ACK is started;

Step 72: Determine whether the RP-ACK is received during the timer period, if not, go to Step 74, if yes, go to Step 73;

Step 73: The terminal displays that the sending of the short message is successful;

Step 74: Determine whether the AS layer of the terminal notifies the SM-RL layer of the release of the radio link during the waiting timer period, if yes, go to Step 76, if not, go to Step 75;

Step 75: Wait for the timer to expire, and return to Step 71;

Step 76: The SM-RL layer of the terminal stops the timer waiting for the RP-ACK;

Step 77: After the terminal successfully camps on the cell again, the AS layer of the terminal reports to the SM-RL layer to notify the radio link recovery, and returns to step 71.

As can be seen from the above, the present invention proposes a method by establishing the interaction between the AS layer and the SM-RL layer to realize the problem that the terminal sends a short message with a long delay in the scenario where the network cannot deliver the RP-Ack due to the release of the wireless link. The mechanism for the terminal to automatically resend SMS messages.

In general, when the terminal sends a short message and does not receive the sending report from the SMS center, if the wireless link is released, the terminal stops waiting for the sending report, and automatically resends the short message immediately after the wireless link is restored. The scenario of wireless link release may be, but not limited to, redirection from LTE to 3G/2G, or redirection between base stations in an LTE system, or an offline scenario.

The solution provided by Embodiment 3 of the present invention is illustrated below with respect to different scenarios.

Scenario 1. Redirection from LTE to 3G/2G, or redirection between base stations in the LTE system

1) After the SM-RL layer of the terminal encapsulates the short message in RP-Data, it is handed over to the CM sublayer layer to be sent by the bottom layer (AS layer), and the SM-RL layer starts the timer waiting for the RP-Ack, and judges that the timer is during the timer period. Whether RP-Ack is received;

2) The base station decides to redirect according to the inter-system/inter-frequency measurement report reported by the AS layer when the signal of the local cell is weak, the signal of the adjacent system or the adjacent cell is strong, which can be the redirection of LTE to 3G/2G, or the LTE system For redirection between intra-base stations, the RRC Connection Release radio resource control connection release message is sent to the AS layer;

3) The AS layer releases the RRC connection after receiving the RRC Connection Release message;

4) The AS layer reports to the SM-RL layer to notify the radio link release;

5) The SM-RL layer judges that the timer has not timed out and has not received the RP-Ack, then stops the timer waiting for the RP-Ack;

6) In the case of redirection from LTE to 3G/2G, after the terminal AS layer searches for a 3G/2G cell and successfully camps on it, it reports to the SM-RL layer to notify the radio link recovery; if it is redirection between base stations in the LTE system, After the terminal AS layer searches for the LTE cell and successfully camps on it, it reports to the SM-RL layer to notify the radio link recovery;

7) After the SM-RL layer of the terminal re-encapsulates the short message in RP-Data, it is handed over to the CM sublayer layer to be sent by the bottom layer (AS layer).

Scenario 2. Off-net scenario

1) After the SM-RL layer of the terminal encapsulates the short message in the RP-Data, it is sent to the CM sublayer layer by the bottom layer (AS layer), and the SM-RL layer starts the timer waiting for the RP-Ack;

2) The terminal AS layer loses synchronization (can not receive the signal, and cannot track the downlink signal), causing the wireless link to fail, and the AS layer automatically releases the RRC connection and enters the off-network state;

3) The AS layer of the terminal reports to the SM-RL layer to notify the radio link release;

4) The SM-RL layer determines that the timer has not expired and the RP-Ack has not been received, and then stops the timer waiting for the RP-Ack;

5) After the terminal AS layer searches for a suitable cell and successfully camps on it, it reports to the SM-RL layer to notify the radio link recovery;

6) After the SM-RL layer of the terminal re-encapsulates the short message in RP-Data, it is handed over to the CM sublayer layer to be sent by the bottom layer (AS layer).

The solution provided by the third embodiment of the present invention is from the perspective of shortening the delay time of re-sending a short message, without waiting for the timer for receiving the RP-Ack to expire, and the terminal can immediately re-send the short message after the redirection is completed or the disconnection disappears, which greatly shortens the time. The delay time for resending SMS messages is shortened by more than tens of seconds, and the user experience is improved.

The solution provided by the third embodiment of the present invention is applicable to LTE terminals, 3G terminals and 2G terminals.

Embodiment 4

As shown in FIG. 8 , the terminal in Embodiment 4 of the present invention includes:

A short message sending module 81, configured to send a short message to the network side, and wait for a sending report fed back by the network side within a preset time period;

The short message resending module 82 is configured to resend the short message after the wireless link is restored if the wireless link is released during the waiting process.

The terminal provided in Embodiment 4 of the present invention automatically re-sends the wireless link after the wireless link is recovered after the wireless link is released during the process of waiting for the sending report fed back by the network side within a preset time period after sending the short message. For SMS, there is no need to wait for the end of the timer, which greatly shortens the delay time of SMS retransmission and improves the user experience.

Wherein, "in the process of waiting" indicates that the timer set for receiving the transmission report fed back by the network side has not timed out.

Specifically, the short message sending module includes: a first processing submodule for encapsulating the short message into relay layer data signaling through the short message relay layer, and then encapsulating it into control layer data signaling through the connection management sublayer, and finally The access layer is encapsulated as a non-access layer message and sent to the network side; the activation submodule is used to start a timer waiting for the relay layer correct response signaling fed back by the network side through the short message relay layer.

Wherein, the short message retransmission module includes: a second processing sub-module, configured to release the wireless link through the access layer if the preset conditions for releasing the wireless link are met during the waiting process, and detect the wireless link in real time whether the road is restored;

The first resending submodule is used to resend the short message when the detection result is yes.

Specifically, the second processing sub-module includes: a third processing sub-module, configured to release the wireless link through the access layer if the signal strength value of the local cell is less than or equal to the preset value during the waiting process.

Corresponding to the situation of redirection, the third processing sub-module includes: a reporting sub-module, which is used in the waiting process, if the signal strength value of the local cell is smaller than the signal strength value of the neighboring system or the neighboring cell, then access The layer reports the measurement report of different systems or different frequencies to the base station, so that the base station decides to redirect; the receiving and releasing sub-module is used to receive, through the access layer, the radio resource control connection release issued by the base station according to the measurement report. instruction, and release the radio link according to the radio resource control connection release instruction.

Corresponding to the off-network situation, the third processing sub-module includes: an automatic release sub-module for automatically releasing the wireless link through the access layer if the signal strength value of the local cell is equal to zero during the waiting process.

Wherein, the second processing sub-module is specifically used for: detecting in real time whether a cell that satisfies the conditions is searched and the camping is successful.

It avoids the situation of repeating the sending of the short message after the timer expires after the wireless link is restored, and meets the needs of users with high quality. Stop waiting for the sending report fed back by the network side.

Specifically, the short message retransmission module includes: a first generating sub-module for generating a wireless link release notification through the access layer; a stopping sub-module for stopping according to the wireless link release notification through the short message relay layer Wait for the sending report fed back by the network side.

In detail, the short message retransmission module includes: a second generation submodule for generating a wireless link recovery notification through the access layer after the wireless link is recovered; a second retransmission submodule for relaying through the short message The layer resends the short message according to the wireless link recovery notification.

Wherein, the above-mentioned implementation embodiments of the method for automatically resending a short message are all applicable to the embodiments of the terminal, and the same technical effect can also be achieved.

Many of the functional components described in this specification are referred to as modules/sub-modules to more particularly emphasize the independence of their implementation.

In this embodiment of the present invention, the modules/sub-modules may be implemented in software so as to be executed by various types of processors. For example, an identified executable code module may comprise one or more physical or logical blocks of computer instructions, which may be structured as objects, procedures, or functions, for example. Nonetheless, the executable code of the identified module need not be physically located together, but may include different instructions stored in different bits that, when logically combined, constitute the module and implement the specification of the module Purpose.

In practice, an executable code module may be a single instruction or many instructions, and may even be distributed over multiple different code segments, among different programs, and across multiple memory devices. Likewise, operational data may be identified within modules, and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations (including over different storage devices), and may exist at least in part only as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module that can be implemented by software, regardless of cost, can build corresponding hardware circuits to implement corresponding functions. The hardware circuits include conventional very large scale integration (VLSI) circuits or gate arrays as well as off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices, such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as It is the protection scope of the present invention.

Claims (16)

1. a method for automatically resending a short message, comprising: Send a short message to the network side, and wait for the sending report fed back by the network side within a preset time period; During the waiting process, if the wireless link is released, after the wireless link is recovered, re-send the short message, including: during the waiting process, if the preset conditions for releasing the wireless link are met, releasing the short message through the access layer wireless link, and detect whether the wireless link is restored in real time; when the detection result is yes, resend the short message, and after the wireless link is restored, generate a wireless link recovery notification through the access layer; Re-send the text message after the wireless link recovery notification mentioned above. 2. The method according to claim 1, wherein the step of sending a short message to the network side and waiting for a sending report fed back by the network side within a preset time period comprises: After the short message is encapsulated into relay layer data signaling through the SMS relay layer, it is then encapsulated into the control layer data signaling through the connection management sublayer, and finally encapsulated into the non-access layer message through the access layer and sent to the network side; A timer that waits for the correct response signaling of the relay layer fed back by the network side is started through the short message relay layer. 3. The method according to claim 1, wherein, in the waiting process, if a preset condition for releasing the wireless link is satisfied, the step of releasing the wireless link through the access layer comprises: During the waiting process, if the signal strength value of the local cell is less than or equal to the preset value, the wireless link is released through the access layer. 4. The method according to claim 3, wherein, during the waiting process, if the signal strength value of the local cell is less than or equal to a preset value, the step of releasing the wireless link through the access layer comprises: During the waiting process, if the signal strength value of the local cell is smaller than the signal strength value of the neighboring system or neighboring cell, the access layer reports the measurement report of the different system or the different frequency to the base station, so that the base station decides to redirect; The radio resource control connection release instruction issued by the base station according to the measurement report is received by the access layer, and the radio link is released according to the radio resource control connection release instruction. 5. The method according to claim 3, wherein, during the waiting process, if the signal strength value of the local cell is less than or equal to a preset value, the step of releasing the wireless link through the access layer comprises: During the waiting process, if the signal strength value of the local cell is equal to zero, the wireless link is automatically released through the access layer. 6. The method of claim 1, wherein the step of detecting whether the wireless link is recovered in real time is specifically: Detect in real time whether a cell that meets the conditions is found and the camping is successful. 7. The method of claim 1, wherein after releasing the wireless link, before the wireless link is restored, the method further comprises: Stop waiting for the sending report fed back by the network side. 8. The method according to claim 7, wherein the step of stopping waiting for the transmission report fed back by the network side comprises: Generate a radio link release notification through the access layer; The short message relay layer stops waiting for the sending report fed back by the network side according to the wireless link release notification. 9. A terminal, characterized in that, comprising: The short message sending module is used to send short messages to the network side and wait for the sending report fed back by the network side within a preset time period; The short message resending module is used to resend the short message after the wireless link is restored if the wireless link is released during the waiting process; the short message resending module includes: The second processing submodule is configured to release the wireless link through the access layer if the preset condition for releasing the wireless link is satisfied during the waiting process, and detect whether the wireless link is recovered in real time; The first resending submodule is used to resend the short message when the detection result is yes; a first generating submodule, configured to generate a radio link release notification through the access layer; The stop sub-module is configured to stop waiting for the sending report fed back by the network side according to the wireless link release notification through the short message relay layer. 10. The terminal according to claim 9, wherein the short message sending module comprises: The first processing submodule is used to encapsulate the short message into the relay layer data signaling through the short message relay layer, then encapsulate it into the control layer data signaling through the connection management sublayer, and finally encapsulate it into the non-access layer through the access layer. The message is sent to the network side; The starter submodule is used to start the timer of the relay layer's correct response signaling that is fed back by the network side through the short message relay layer. 11. The terminal according to claim 9, wherein the second processing submodule comprises: The third processing submodule is configured to release the wireless link through the access layer if the signal strength value of the local cell is less than or equal to the preset value during the waiting process. 12. The terminal according to claim 11, wherein the third processing submodule comprises: The reporting sub-module is used to report the measurement report of the different system or the different frequency to the base station through the access layer if the signal strength value of the local cell is less than the signal strength value of the neighboring system or the neighboring cell during the waiting process, so that all The base station decides to redirect; The receiving and releasing sub-module is configured to receive, through the access layer, the radio resource control connection release instruction issued by the base station according to the measurement report, and release the radio link according to the radio resource control connection release instruction. 13. The terminal according to claim 11, wherein the third processing submodule comprises: The automatic release sub-module is used to automatically release the wireless link through the access layer if the signal strength value of the local cell is equal to zero during the waiting process. 14. The terminal according to claim 9, wherein the second processing submodule is specifically configured to: Detect in real time whether a cell that meets the conditions is found and the camping is successful. 15 . The terminal according to claim 9 , wherein the short message retransmission module is further configured to stop waiting for a transmission report fed back by the network side before the wireless link is restored after the wireless link is released. 16 . 16. The terminal according to claim 9, wherein the short message retransmission module comprises: The second generating submodule is configured to generate a wireless link recovery notification through the access layer after the wireless link is recovered; The second resending submodule is configured to resend the short message through the short message relay layer according to the wireless link recovery notification.

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