CN110958582B - Mobile terminal and method for processing GSM network short message service - Google Patents
Mobile terminal and method for processing GSM network short message service Download PDFInfo
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- H04W4/12—Messaging; Mailboxes; Announcements
- H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
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- H—ELECTRICITY
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Abstract
The application discloses a method for processing a GSM network short message service by a mobile terminal, which comprises the following steps. Step S110: when finding that the short message data frame is being transmitted, the mobile terminal enters step S120; otherwise, the process proceeds to step S140. Step S120: the mobile terminal judges whether the measured value of the downlink receiving level of the current GSM cell is larger than or equal to a first threshold value; if yes, go to step S130; if not, the process proceeds to step S140. Step S130: when the mobile terminal makes a measurement report, the report value of the downlink receiving level in the measurement report is adjusted upwards and then is sent to the network side. Step S140: when the mobile terminal makes a measurement report, the report value of the downlink receiving level in the measurement report is directly sent to the network side without any adjustment. The method and the device can reduce the possibility of interference caused by cell switching required by a network side in the process of receiving and sending the short message.
Description
Technical Field
The application relates to a short message service processing method in a GSM mobile communication system, which is suitable for a GSM single-mode mobile terminal and a multi-mode mobile terminal supporting a GSM mode.
Background
In a GSM Mobile communication System (Global System for Mobile communication), the initiation of a short message service is divided into the following two cases.
The first case is that a mobile terminal (UE) initiates a short message service, such as sending or receiving a short message, in an idle standby state. At this time, the terminal side may initiate RACH (Random Access Channel) Access, and apply for Channel resources to the network side. The network side allocates appropriate resources to the terminal side through an Immediate allocation (Immediate allocation) air interface message. Then, the data link layer at the terminal side configures uplink and downlink channels, including a Dedicated Channel SDCCH (Stand-Alone Dedicated Control Channel) or a TCH (Traffic Channel), and also including a Slow Associated Control Channel (Slow Associated Control Channel), and enters a connection state. And then the terminal side transmits the uplink or downlink short message data frame in the state.
The second situation is that the mobile terminal has entered the GSM voice call state, and at this time, a dedicated channel has been established for the voice call service, and a short message service can be initiated in parallel on this channel through an accompanying channel to transmit an uplink or downlink short message data frame.
When the existing mobile terminal performs the short message service at the GSM cell boundary, if cell switching occurs, the network side data link layer has the possibility of losing the short message data frame, resulting in the failure of the short message service.
SAPI (Service Access Point Identifiers) is used in GSM mobile communication systems to distinguish between different types of higher layer data. The SAPI0 data link is used to transmit higher layer signaling data and the SAPI3 data link is used to transmit short message data.
Disclosure of Invention
The technical problem to be solved by the application is to provide a method for processing a GSM network short message service by a mobile terminal, which can reduce the situation of short message service failure caused by cell switching.
In order to solve the technical problem, the application provides a method for processing a GSM network short message service by a mobile terminal, wherein the mobile terminal supports a GSM mode, currently resides in a GSM mobile communication network and uses services provided by a GSM cell; the method comprises the following steps. Step S110: when finding that the short message data frame is being transmitted, the mobile terminal enters step S120; otherwise, the process proceeds to step S140. Step S120: the mobile terminal judges whether the measured value of the downlink receiving level of the current GSM cell is larger than or equal to a first threshold value; if yes, go to step S130; if not, the process proceeds to step S140. Step S130: when the mobile terminal makes a measurement report, the report value of the downlink receiving level in the measurement report is adjusted upwards and then is sent to the network side. Step S140: when the mobile terminal makes a measurement report, the report value of the downlink receiving level in the measurement report is directly sent to the network side without any adjustment.
According to the method for processing the GSM network short message service by the mobile terminal, when the signal quality of the current GSM cell is judged to be enough to meet the short message service through the measured value of the downlink receiving level of the GSM cell, the report value of the downlink receiving level is up-regulated in the measurement report sent to the network side by the mobile terminal, so that the probability that the network side sends a cell switching instruction at the moment is reduced, and the possibility of interference caused by the requirement of the network side on cell switching in the process of receiving and sending short messages is reduced.
Further, in step S110, the GSM data link layer of the mobile terminal detects whether a short message data frame is being transmitted. This is a preferred implementation.
Further, in step S110, when the GSM data link layer of the mobile terminal receives the downlink data frame sent by the physical layer, if the frame type is an information frame and is on the SAPI3 data link, it is determined that the short message data frame is currently being received; if k1 unnumbered information frames are continuously received on the SACCH, the current reception of the short message data frame is considered to be absent; k1 is an integer greater than or equal to 2. This is a preferred implementation in determining that the short message data frame is being received.
Further, in step S110, the channels allocated to the GSM data link layer of the mobile terminal are accompanied by SACCH and SDCCH; at this time, if there is an unsent information frame on the SAPI3 data link, the GSM data link layer of the mobile terminal considers that a short message data frame is currently being sent; when there is no unsent information frame on the SAPI3 data link, it is considered that no sms data frame is currently sent. This is a preferred implementation in determining that a short message data frame is being sent.
Further, in step S110, the channels allocated by the GSM data link layer of the mobile terminal are accompanied by SACCH and TCH; after the data frame on the SAPI0 data link is preferentially sent, if an unsent information frame still exists on the SAPI3 data link, the GSM data link layer of the mobile terminal considers that the short message data frame is currently sent; when there is no unsent information frame on the SAPI3 data link, it is considered that no sms data frame is currently sent. This is another preferred implementation of determining that a short message data frame is being sent.
Further, in step S120, the physical layer of the mobile terminal reports a measured value of a downlink receiving level of the SACCH channel of the current GSM cell; and the GSM radio resource management layer of the mobile terminal compares the measured value of the downlink receiving level of the current GSM cell with the first threshold value. This is a preferred implementation.
Further, in step S130 and step S140, the GSM radio resource management layer of the mobile terminal makes a measurement report, adjusts or does not adjust a report value of the downlink reception level, and sends the measurement report to the network side. This is a preferred implementation.
Further, in the step S130, the first threshold is-90 dBm to-95 dBm. This is a preferred implementation.
Further, in step S130, the report value of Rx level (full serving cell) and the report value of Rx level (sub serving cell) in the measurement report are both adjusted upward by the second threshold. This is a preferred implementation.
Further, in the step S130, the second threshold is 3dBm to 5 dBm. This is a preferred implementation.
The application also provides a mobile terminal; the mobile terminal supports a GSM mode, currently resides in a GSM mobile communication network and uses services provided by a GSM cell; the mobile terminal comprises a short message transmission judging unit, a measured value judging unit and a report value adjusting unit. The short message transmission judging unit is used for judging whether the mobile terminal has a short message data frame which is being transmitted. The measured value judging unit is used for further judging whether the measured value of the downlink receiving level of the current GSM cell is larger than a first threshold value when the mobile terminal finds that the short message data frame is transmitted. The report value adjusting unit is used for making a measurement report, adjusting the report value of the downlink receiving level in the measurement report upwards when the measurement value of the downlink receiving level is greater than a first threshold value, and then sending the report value to the network side; the report value adjusting unit is further configured to directly send the report value of the downlink receiving level in the measurement report to the network side without any adjustment when the measurement value of the downlink receiving level is less than or equal to the first threshold or when the mobile terminal has no short message data frame being transmitted.
When the mobile terminal judges that the signal quality of the current GSM cell is enough to meet the short message service through the measured value of the downlink receiving level of the GSM cell, the report value of the downlink receiving level is adjusted in the measurement report sent to the network side by the mobile terminal, so that the probability of sending a cell switching instruction by the network side at the moment is reduced, and the possibility of interference caused by the cell switching required by the network side in the process of receiving and sending the short message is reduced.
Further, the short message transmission judging unit is realized by a GSM data link layer of the mobile terminal. The measured value judging unit is realized by a GSM wireless resource management layer of the mobile terminal; wherein the measurement of the downlink reception level of the current GSM cell is provided by the physical layer of the mobile terminal. The report value adjusting unit is realized by a GSM radio resource management layer of the mobile terminal. This is a preferred implementation.
The method has the technical effects that when the signal quality of the current GSM cell is enough to meet the short message service, the report value of the downlink receiving level is up-regulated in the measurement report sent to the network side by the mobile terminal, so that the probability of sending a cell switching instruction by the network side at the moment is reduced, and the possibility of interference caused by the requirement of the network side on cell switching in the short message receiving and sending process is reduced.
Drawings
Fig. 1 is a flowchart of a method for processing a GSM network short message service by a mobile terminal according to the present application.
Fig. 2 is a schematic structural diagram of a mobile terminal provided in the present application.
The reference numbers in the figures illustrate: 200 is a mobile terminal; 210 is a short message transmission judging unit; 220 is a measured value judging unit; and 230 is a report value adjusting unit.
Detailed Description
Referring to fig. 1, the method for processing the GSM network short message service by the mobile terminal provided by the present application includes the following steps. The mobile terminal supports the GSM mode, currently resides in a GSM mobile communication network, and uses the service provided by a GSM cell. The method for processing the GSM network short message service comprises the following steps.
Step S110: when the mobile terminal finds that the short message data frame is being transmitted, the process proceeds to step S120. When the mobile terminal finds that no short message data frame is being transmitted, the process proceeds to step S140. The short message data frame is transmitted, which comprises two conditions: the short message data frame is receiving and the short message data frame is sending.
Step S120: the mobile terminal judges whether the measured value of the downlink receiving level (Rx level) of the current GSM cell is larger than or equal to a first threshold value. If so, the process proceeds to step S130. If not, the process proceeds to step S140.
In this step, the signal quality of the current GSM cell is reflected by comparing the measured value of the downlink reception level with the first threshold. When the measured value of the downlink receiving level is greater than or equal to the first threshold value, the signal quality of the current GSM cell is considered to be capable of satisfying the normal communication. When the measured value of the downlink receiving level is smaller than the first threshold value, the signal quality of the current GSM cell is considered to be not capable of satisfying the normal communication.
Step S130: when the mobile terminal makes a measurement report, the report value of the downlink receiving level in the measurement report is adjusted upwards and then is sent to the network side. The purpose of this is to improve the evaluation quality of the current GSM cell on the network side, thereby reducing or delaying the triggering of the cell handover command on the network side.
Step S140: when the mobile terminal makes a measurement report, the report value of the downlink receiving level in the measurement report is directly sent to the network side without any adjustment.
The measurement report sent by the mobile terminal to the network side contains the signal quality conditions of the current GSM cell and the neighboring GSM cells, and if the signal quality of the current GSM cell is enough to provide normal service for the mobile terminal, but a GSM cell with better signal quality is found in the neighboring GSM cells, the network side may also perform cell handover. The method and the device optimize the scene, and can reduce the possibility of interference caused by cell switching required by a network side in the process of receiving and sending the short message data frame, thereby improving the success rate of the short message service at the boundary of the GSM cell.
Preferably, in step S110, the GSM data link layer of the mobile terminal detects whether a short message data frame is being transmitted.
Preferably, in step S110, when the GSM data link layer of the mobile terminal receives a downlink data Frame sent by the physical layer, if the Frame type is an Information Frame (Information Frame) and is on the SAPI3 data link, it is considered that a short message data Frame is currently being received; if 1 Unnumbered Information frames (Unnumbered Information frames) are continuously received on the SACCH, no short message data Frame is received currently. Wherein k1 is an integer greater than or equal to 2. Preferably, K1 is taken to be 3.
Preferably, in step S110, the channels allocated by the GSM data link layer of the mobile terminal are associated with SACCH and SDCCH. At this time, if there is an unsent information frame on the SAPI3 data link, the GSM data link layer of the mobile terminal considers that a short message data frame is currently being sent. When there is no unsent information frame on the SAPI3 data link, it is considered that no sms data frame is currently sent.
Preferably, in step S110, the channels allocated by the GSM data link layer of the mobile terminal are associated with SACCH and TCH. After the data frame on the SAPI0 data link has been transmitted preferentially at this time, if there is still an unsent information frame on the SAPI3 data link, the GSM data link layer of the mobile terminal considers that a short message data frame is currently being transmitted. When there is no unsent information frame on the SAPI3 data link, it is considered that no sms data frame is currently sent.
Preferably, in step S120, the physical layer of the mobile terminal reports a measured value of a downlink receiving level of a SACCH channel of the current GSM cell. And the GSM radio resource management layer of the mobile terminal compares the measured value of the downlink receiving level of the current GSM cell with the first threshold value.
Preferably, in step S130 and step S140, the GSM radio resource management layer of the mobile terminal makes a measurement report, adjusts or does not adjust a report value of the downlink reception level, and sends the measurement report to the network side.
Preferably, in the step S130, the first threshold is-90 dBm to-95 dBm.
Preferably, in step S130, the report value of Rx level (full serving cell) and the report value of Rx level (sub serving cell) in the measurement report are both adjusted upward by the second threshold.
Preferably, in the step S130, the second threshold is 3dBm to 5 dBm.
Referring to fig. 2, the present application also provides a mobile terminal corresponding to the method for processing the GSM network short message service by the mobile terminal. The mobile terminal supports the GSM mode, currently resides in a GSM mobile communication network, and uses the service provided by a GSM cell. The mobile terminal 200 includes a short message transmission determining unit 210, a measurement value determining unit 220, and a report value adjusting unit 230.
The short message transmission determining unit 210 is used to determine whether a short message data frame is being transmitted by the mobile terminal. The short message transmission determining unit 210 is implemented by, for example, a GSM data link layer of the mobile terminal.
The measurement value determining unit 220 is configured to further determine whether a measurement value of a downlink receiving level of a current GSM cell is greater than a first threshold value when the mobile terminal finds that a short message data frame is being transmitted. The measurement value determining unit 230 may be implemented by, for example, a GSM radio resource management layer of the mobile terminal. To obtain the measured value of the downlink receiving level of the current GSM cell, the measurement value needs to be implemented by an antenna module, a wireless transceiver (transceiver) module, a GSM physical layer software processing module, and the like of the mobile terminal.
The report value adjusting unit 230 is configured to create a measurement report, adjust a report value of a downlink reception level in the measurement report upward when a measurement value of the downlink reception level is greater than a first threshold, and send the report value to the network side. The report value adjusting unit 230 is further configured to directly send the report value of the downlink receiving level in the measurement report to the network side without any adjustment when the measurement value of the downlink receiving level is less than or equal to the first threshold or when the mobile terminal has no short message data frame being transmitted. The report value adjusting unit 230 may be implemented by, for example, a GSM radio resource management layer of the mobile terminal.
According to the mobile terminal and the method for processing the GSM network short message service, the data frame of the GSM network short message service is dynamically identified, on the premise that the normal communication of the mobile terminal is not influenced, targeted optimization processing is performed on the measurement report in the GSM network, the adverse influence of a cell switching instruction at a network side on the GSM network short message service is avoided, the success rate of the short message service of the mobile terminal in the GSM mobile communication network, particularly at the boundary of some GSM cells, is improved, and the use experience of a user is improved.
The above are merely preferred embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (12)
1. A method for processing GSM network short message service by mobile terminal, the mobile terminal supports GSM mode, and resides in GSM mobile communication network, uses the service provided by GSM cell; the method is characterized by comprising the following steps:
step S110: when finding that the short message data frame is being transmitted, the mobile terminal enters step S120; otherwise, go to step S140;
step S120: the mobile terminal judges whether the measured value of the downlink receiving level of the current GSM cell is larger than or equal to a first threshold value; if yes, indicating that the signal quality of the current GSM cell can meet the requirement of normal communication, entering step S130; if not, indicating that the signal quality of the current GSM cell cannot meet the normal communication, entering step S140;
step S130: when the mobile terminal makes a measurement report, the report value of the downlink receiving level in the measurement report is adjusted upwards and then sent to the network side so as to reduce or delay the cell switching instruction of the network side;
step S140: when the mobile terminal makes a measurement report, the report value of the downlink receiving level in the measurement report is directly sent to the network side without any adjustment.
2. The method as claimed in claim 1, wherein the GSM data link layer of the mobile terminal detects whether a short message data frame is being transmitted in step S110.
3. The method as claimed in claim 2, wherein in step S110, when the GSM data link layer of the mobile terminal receives a downlink data frame sent by the physical layer, if the frame type is an information frame and is on the SAPI3 data link, it is determined that the short message data frame is currently being received; if k1 unnumbered information frames are continuously received on the SACCH, the current reception of the short message data frame is considered to be absent; k1 is an integer greater than or equal to 2.
4. The method of claim 2, wherein in step S110, the channels allocated to the GSM data link layer of the mobile terminal are associated with SACCH and SDCCH; at this time, if there is an unsent information frame on the SAPI3 data link, the GSM data link layer of the mobile terminal considers that a short message data frame is currently being sent; when there is no unsent information frame on the SAPI3 data link, it is considered that no sms data frame is currently sent.
5. The method of claim 2, wherein in step S110, the channels allocated to the GSM data link layer of the mobile terminal are associated with SACCH and TCH; after the data frame on the SAPI0 data link is preferentially sent, if an unsent information frame still exists on the SAPI3 data link, the GSM data link layer of the mobile terminal considers that the short message data frame is currently sent; when there is no unsent information frame on the SAPI3 data link, it is considered that no sms data frame is currently sent.
6. The method of claim 1, wherein in step S120, the physical layer of the mobile terminal reports a measured value of a downlink reception level of a SACCH channel of a current GSM cell; and the GSM radio resource management layer of the mobile terminal compares the measured value of the downlink receiving level of the current GSM cell with the first threshold value.
7. The method as claimed in claim 1, wherein in step S130 and step S140, the GSM rrc layer of the mobile terminal makes a measurement report, adjusts or does not adjust a report value of a downlink reception level, and sends the measurement report to the network side.
8. The method as claimed in claim 1, wherein the first threshold is-90 dBm to-95 dBm in step S130.
9. The method as claimed in claim 1, wherein in step S130, the report value of Rx level (full serving cell) and the report value of Rx level (sub serving cell) in the measurement report are both adjusted upward by the second threshold.
10. The method as claimed in claim 9, wherein the second threshold is 3dBm to 5dBm in step S130.
11. A kind of mobile terminal; the mobile terminal supports a GSM mode, currently resides in a GSM mobile communication network and uses services provided by a GSM cell; the mobile terminal is characterized by comprising a short message transmission judging unit, a measured value judging unit and a report value adjusting unit;
the short message transmission judging unit is used for judging whether a short message data frame is transmitted by the mobile terminal;
the measured value judging unit is used for further judging whether the measured value of the downlink receiving level of the current GSM cell is greater than a first threshold value when the mobile terminal finds that the short message data frame is transmitted; if yes, the signal quality of the current GSM cell can meet the requirement of normal communication; if not, the signal quality of the current GSM cell cannot meet the requirement of normal communication;
the report value adjusting unit is used for making a measurement report, adjusting the report value of the downlink receiving level in the measurement report upwards when the measured value of the downlink receiving level is greater than a first threshold value, and then sending the report value to the network side so as to reduce or delay triggering of a cell switching instruction of the network side; the report value adjusting unit is further configured to directly send the report value of the downlink receiving level in the measurement report to the network side without any adjustment when the measurement value of the downlink receiving level is less than or equal to the first threshold or when the mobile terminal has no short message data frame being transmitted.
12. The mobile terminal of claim 11, wherein the short message transmission determining unit is implemented by a GSM data link layer of the mobile terminal;
the measured value judging unit is realized by a GSM wireless resource management layer of the mobile terminal; wherein the measured value of the downlink reception level of the current GSM cell is provided by the physical layer of the mobile terminal;
the report value adjusting unit is realized by a GSM radio resource management layer of the mobile terminal.
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