CN103874034B - Short message sending, method of reseptance and system - Google Patents

Abstract

The invention discloses a method and system for sending and receiving short messages, which utilizes a fast service channel to realize sending and receiving short messages, instead of sending and receiving short messages on an independent dedicated control channel as in the prior art, and can greatly shorten the time used for sending or receiving short messages. To a certain extent, it can reduce the problem of SMS sending failure or incomplete reception, improve the reliability of SMS service and the satisfaction of user experience; in addition, using the fast service channel of the community to receive and send SMS can reduce the occupation of independent dedicated service for SMS The time of the control channel saves independent dedicated control channel resources for other terminal location updates, call origination and other services, reduces the probability of independent dedicated control channel congestion, balances the load of independent dedicated control channels and service channels, and is more conducive to improving the utilization of resources Rate.

Description

Short message sending and receiving method and system

technical field

The invention relates to the communication field, in particular to a short message sending and receiving method and system.

Background technique

Short Message Service (Short Message Service, SMS) is a basic service provided by operators. In idle mode, the terminal sends and receives text messages on the SDCCH (Standalone Dedicated Control Channel, Independent Dedicated Control Channel) channel, where the service access point identifier SAPI=3 (Service Access Point Identifier); (Slow Associated Control Channel with TrafficChannel, slow associated control channel with traffic channel) send and receive short messages on the channel, also SAPI=3. However, most terminals send and receive SMS in idle mode. When editing a long text message and sending it in idle mode (generally, a text message edited with 70 Chinese characters is defined as a standard text message, and a text message with more than 70 Chinese characters is called a long text message), sometimes the sending fails, or the receiver fails to receive the text message. complete phenomenon. The reason for the blame is that the SDCCH channel appears once in 26 multiframe periods, and the position is fixed, so the transmission of signaling is slow; and the content of long short messages is too long, so it will occupy the SDCCH channel for a long time, because long short messages occupy more Long-term SDCCH channel, when the SMS is transmitted in an area where cell switching occurs frequently or in an area with poor network quality, key signaling of the SMS will be lost, and SMS sending failure or incomplete SMS reception will occur. However, if a retransmission mechanism is adopted in order to ensure the reliable sending of short messages, it will inevitably further prolong the time that the SMS occupies the SDCCH channel, and cannot fundamentally solve the above problems.

Contents of the invention

The main technical problem to be solved by the present invention is to provide a method and system for sending and receiving short messages, so as to solve the problem that in the process of sending or receiving short messages, an independent dedicated control channel needs to be occupied for a long time, resulting in failure to send short messages or insufficient reception of short messages. total question.

In order to solve the above technical problems, the present invention provides a short message sending method, comprising:

Receive the channel request sent by the sender;

Judging whether the cell where the sender is currently located satisfies the conditions for establishing a fast traffic channel for the sender, and if so, establishes a fast traffic channel for the sender;

The sender sends the short message through the established fast service channel.

In an embodiment of the present invention, judging whether the cell where the sender is currently located meets the conditions for establishing a fast traffic channel for the sender includes:

Judging whether the value obtained by dividing the number of idle traffic channels in the cell by the number of traffic channels configured in the cell is greater than a first preset threshold value, if so, consider that the cell meets the conditions for establishing a fast traffic channel for the sender.

In an embodiment of the present invention, before establishing the fast service channel for the sender, it also includes judging whether the value of the random access information of the channel requested by the channel request is a preset value, and if so, the The sender establishes a fast service channel.

In an embodiment of the present invention, sending a short message by the sender through the established fast service channel includes:

The sender establishes a control channel link on the fast traffic channel; sends a short message through the established control channel link.

In an embodiment of the present invention, the fast traffic channel is a fast associated control channel.

In order to solve the above problems, the present invention also provides a short message sending system, comprising a sender's mobile station, a sender's base station controller, and a sender's base transceiver station;

The sender mobile station is used to send a channel request to the sender base transceiver station; and after receiving the fast traffic channel assignment message sent by the sender base transceiver station, send the request through the fast traffic channel assigned by the message short message;

The base station controller of the sender is used to determine whether the cell where the mobile station of the sender is currently located satisfies the conditions for establishing a fast traffic channel for the mobile station of the sender after receiving the channel request sent by the base transceiver station of the sender, such as Satisfied, then send an instruction to establish a fast service channel to the base transceiver station of the sender; The sender mobile station sends a fast traffic channel assignment message;

The sending base transceiver station is used to control the base station to send a channel request after receiving the channel request sent by the sending mobile station; and is used to establish a fast traffic channel after receiving the fast traffic channel indication, And feed back a fast traffic channel establishment success message to the base station controller on the sending side.

In an embodiment of the present invention, the sending base station controller judging whether the cell where the sending mobile station is currently located meets the conditions for establishing a fast traffic channel for the sending mobile station includes:

Judging whether the value obtained by dividing the number of idle traffic channels in the cell by the number of traffic channels configured in the cell is greater than the first preset threshold value, if so, consider that the cell meets the requirements for establishing a fast traffic channel for the sending mobile station condition.

In an embodiment of the present invention, the base station controller at the sending side is further configured to determine that the cell where the mobile station is currently located satisfies the conditions for establishing a fast service channel for the mobile station, and then indicate the parameter of the new cause of the cell set to 1.

In an embodiment of the present invention, the base station controller of the sender is further configured to judge the value of the random access information in the channel request before sending the instruction to establish a fast service channel to the base transceiver station of the sender Whether it is a preset value, and if so, send an instruction to establish a fast traffic channel to the base transceiver station of the sending party.

In order to solve the above problems, the present invention also provides a short message receiving method, comprising:

After receiving the paging message, the receiver sends a channel request;

Establish and assign an independent dedicated control channel to the receiver;

In the process of establishing a control channel link on the assigned independent dedicated control channel, determine whether the cell where the recipient is currently located meets the conditions for establishing a fast traffic channel for the recipient, and if so, establish a fast traffic channel for the recipient ;

The receiving party jumps from the independent dedicated control channel to the fast service channel, and receives the short message through the fast service channel.

In an embodiment of the present invention, during the process of establishing a control channel link on the assigned independent dedicated control channel, judging whether the cell where the receiver is currently located meets the conditions for establishing a fast traffic channel for the receiver includes:

In the process of establishing the control channel link, receive short message data;

Determine whether the value obtained by dividing the number of idle traffic channels in the cell where the receiver is currently located by the number of configured traffic channels is greater than the second preset threshold value, and if so, consider that the cell where the receiver is currently located satisfies the need to establish a fast channel for the receiver. The condition of the traffic channel.

In an embodiment of the present invention, the receiver jumps from the independent dedicated control channel to the fast service channel, and receiving the short message through the fast service channel includes:

The receiver jumps to the fast traffic channel, establishes a control channel link on the fast traffic channel, and receives the short message through the established control channel link.

In order to solve the above-mentioned problems, the present invention also provides a short message receiving system, comprising: a receiver mobile station, a receiver base station controller, and a receiver base station transceiver platform;

The receiver mobile station is used to send a channel request to the receiver base station controller through the receiver base station transceiver platform after receiving the paging message; and is used to receive the independent message sent by the receiver base station controller After the dedicated control channel assignment message, establish a control channel link on the independent dedicated control channel assigned by the message; and after receiving the fast traffic channel assignment message sent by the base station controller of the receiver, use the fast The business channel receives short messages;

The receiver base station controller is used to issue an independent dedicated control channel indication to the receiver base station transceiver platform after receiving the channel request; and is used to receive the receiver base station transceiver platform feedback independent dedicated control channel establishment After the success message, send an independent dedicated control channel assignment message to the receiving mobile station through the receiver's base station transceiver platform; and during the process of establishing a control channel link on the assigned independent dedicated control channel, determine Whether the cell where the mobile station of the receiver is currently located satisfies the conditions for establishing a fast traffic channel for the receiver, and if so, sends a fast traffic channel indication to the transceiver platform of the base station of the receiver; and is used for receiving the base station of the receiver After the fast traffic channel establishment success message fed back by the transceiver platform, the fast traffic channel assignment message is sent to the receiver mobile station through the receiver base station transceiver platform;

The receiver's base station transceiver platform is used to establish an independent dedicated control channel after receiving the independent dedicated control channel indication, and feeds back a successful independent dedicated control channel establishment message to the receiver's base station controller; and is used to receive the independent dedicated control channel After the fast traffic channel is indicated, the fast traffic channel is established, and a fast traffic channel establishment success message is fed back to the receiver base station controller.

In an embodiment of the present invention, the receiver base station controller judging whether the cell where the receiver mobile station is currently located meets the conditions for establishing a fast traffic channel for the receiver mobile station includes:

Judging whether the value obtained by dividing the number of idle traffic channels in the cell where the receiver is currently located by the number of configured traffic channels is greater than a second preset threshold value, and if so, consider that the cell where the receiver is currently located meets the requirements for the mobile station of the receiver. Conditions for establishing a fast traffic channel.

In an embodiment of the present invention, the receiver mobile station jumps from the independent dedicated control channel to the fast traffic channel, and receiving the short message through the fast traffic channel includes:

The receiver mobile station jumps to the fast traffic channel, establishes a control channel link on the fast traffic channel, and receives the short message through the established control channel link.

The beneficial effects of the present invention are:

The method and system for sending and receiving short messages provided by the present invention, when the sender sends a short message, judges whether the cell where the sender is currently located satisfies the conditions for sending short messages by using a fast service channel, and if so, establishes a fast service channel for the sender, And send short messages through the fast service channel; similarly, in the process of receiving short messages, the receiver also judges whether the cell where the receiver is currently located meets the conditions for receiving short messages by using the fast service channel. In order to jump from the independent dedicated control channel to the established fast service channel as soon as possible to receive the short message. It can be seen that the present invention proposes to use the fast service channel to realize the sending and receiving of short messages, instead of sending and receiving short messages on an independent dedicated control channel as in the past, which can greatly shorten the time used for sending or receiving short messages, and can reduce the number of short messages sent to a certain extent. Failure or incomplete reception can improve the reliability of the SMS service and the satisfaction of the user experience; in addition, using the fast service channel of the community to receive and send SMS can reduce the time occupied by the independent dedicated control channel for SMS services, providing other terminals Services such as location update and call origination save independent dedicated control channel resources, reduce the probability of independent dedicated control channel congestion, balance the load of independent dedicated control channels and service channels, and are more conducive to improving resource utilization.

Description of drawings

Fig. 1 is a schematic structural diagram of a short message sending system according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a short message receiving system according to an embodiment of the present invention;

Fig. 3 is a schematic flow chart of a short message sending method according to an embodiment of the present invention;

Fig. 4 is a schematic flowchart of a short message receiving method according to an embodiment of the present invention.

detailed description

The present invention utilizes the fast service channel of the community to realize the sending and receiving of short messages, which can greatly shorten the time used for sending or receiving short messages, reduce the problems of failed sending or incomplete reception of short messages, and improve the reliability of short message services and the satisfaction of user experience; It can also save independent dedicated control channel resources for other terminal location updates, call origination and other services, reduce the probability of independent dedicated control channel congestion, and balance the load of independent dedicated control channels and traffic channels. The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

Please refer to the short message sending system shown in Figure 1, including the sender mobile station (ie the sender MS (MS: MobileStation)), the sender base station controller (ie the sender BSC (BSC: Base Station Controller)), the sender base station The transceiver station (that is, the sender BTS (BTS: Base Transceiver Station)), where:

The sender MS is used to send a channel request to the sender BTS; and after receiving the fast traffic channel assignment message sent by the sender BSC, send a short message through the fast traffic channel assigned by the message;

The sender BSC is used to judge whether the cell where the sender MS is currently located meets the conditions for establishing a fast service channel for the sender MS after receiving the channel request sent by the sender BTS, that is, to judge whether the traffic channel of the cell where the sender MS is currently located is Fuyu, if satisfied, then send an instruction to establish a fast traffic channel to the sender BTS; and send a fast traffic channel assignment message to the sender MS after receiving the fast traffic channel establishment success message fed back by the sender BTS;

The sender BTS is used to send a channel request to the sender BSC after receiving the channel request sent by the sender MS; and is used to establish a fast service channel after receiving the fast service channel indication sent by the sender BSC, and after the establishment is successful Feedback the fast service channel establishment success message to the sender BSC.

Wherein, the sender BSC judges whether the cell where the sender MS is currently located satisfies the conditions for establishing a fast service channel for the sender MS, including:

Judging whether the value obtained by dividing the number of idle traffic channels in the cell by the number of traffic channels configured in the cell is greater than a first preset threshold, if so, consider that the cell meets the conditions for establishing a fast traffic channel for the sending MS. At this time, you can set the "SMS fast sending switch gate" of the community to open; otherwise, set the community's "SMS fast sending switch gate" to close.

In this embodiment, the sender BSC will use the cell as a unit to configure the "short message fast sending switch gate" for each cell according to the above method; when judging whether the current cell meets the establishment of a fast service channel, it only needs to judge the " Send text messages quickly to open and close the door" is open or not. The essence of the above two judgment methods is the same.

In addition, the sender BSC in this embodiment, after judging that the current cell satisfies the conditions for establishing a fast service channel, sets the new cause indication parameter (NECI) of the cell to 1; otherwise, sets the NECI of the cell to 0 . The sender BSC can further determine whether the value of the random access information (RA: Random Access Information) of the channel requested by sending the channel request is a preset value before sending the instruction to the sender BTS to establish a fast service channel. The preset value in the example can be 0001****, that is, the value of RA (Random Access Information) in the requested channel is judged to be 0001****; if so, the instruction to establish a fast service channel is issued to the sender BTS.

It can be seen that in the short message sending system described in Figure 1, in the process of sending short messages, if it is determined that the TCH (traffic channel) of the cell where the short message sender is currently located is rich, it will choose to establish a fast traffic channel for the sender, such as FACCH (Fast Associated Control Channel, fast associated control channel), used as a sending channel for SMS. Using FACCH to send short messages will be much faster than using SDCCH to send short messages, so it can greatly shorten the time used for sending short messages, reduce the problem of short message sending failures, improve the reliability of short message services and the satisfaction of user experience; it can also be provided for other terminals More remaining SDCCH resources reduce the probability of SDCCH congestion. Similarly, on the receiving side, the fast service channel can also be used to receive short messages, as follows:

Please refer to Figure 2: the short message receiving system includes the receiving mobile station (receiving MS), the receiving base station controller (receiving BSC), the receiving base station transceiver platform (receiving BTS) and the receiving mobile Switching center (ie receiver MSC (MSC: Mobile Switching Center)); where:

The recipient MS is used to send a channel request to the recipient BSC through the recipient BTS after receiving the paging message sent by the mobile switching center; and is used to receive the independent dedicated control channel assignment message sent by the recipient BSC. Establish a control channel link on the independent dedicated control channel assigned by the message; and after receiving the fast traffic channel assignment message sent by the receiver BSC, receive the short message through the fast traffic channel assigned by the message; specifically, on the fast traffic channel Establish a control channel link on the Internet; receive short messages through the established control channel link;

The receiver BSC is used to issue an independent dedicated control channel indication to the receiver BTS after receiving the channel request from the receiver BTS; and is used to issue an independent dedicated control channel to the receiver MS after receiving Sending an independent dedicated control channel assignment message; and after receiving the short message data RP_DATA sent by the receiving party MSC, judging whether the current cell of the receiving party MS meets the conditions for establishing a fast traffic channel for the receiving party, and if so, send a message to the receiving party BTS Sending a fast traffic channel indication; and sending a fast traffic channel assignment message to the receiver MS after receiving the fast traffic channel establishment success message fed back by the receiver's BTS;

The recipient MSC is used to forward the short message data RP_DATA sent by the SMS center to the recipient BSC during the establishment of the control channel link by the recipient MS on the independent dedicated control channel;

The receiving BTS is used to establish the independent dedicated control channel after receiving the independent dedicated control channel indication, and feeds back the independent dedicated control channel establishment success message to the receiving BSC; and is used to establish the fast traffic channel after receiving the fast traffic channel indication, And feed back the fast service channel establishment success message to the receiver BSC.

In this embodiment, the receiver BSC judges whether the cell where the receiver MS is currently located satisfies the conditions for establishing a fast traffic channel for the receiver MS, including judging the number of idle traffic channels in the cell where the receiver is currently located divided by the number of configured traffic channels. Whether the value is greater than the second preset threshold value, if yes, it is considered that the cell where the receiver is currently located meets the conditions for establishing a fast traffic channel for the MS of the receiver.

Its specific judging method is consistent with that of the sender BSC judging whether the current cell meets the conditions for establishing a fast service channel. The first preset threshold value and the second threshold preset threshold value in this embodiment can be the same, and the second A preset threshold value and a second preset threshold value may be specifically selected according to different network configurations, and specific values may be (0, 1], which will not be repeated here.

It can be seen that the short message receiving system in this embodiment can also judge whether the sub-district where the receiving party is currently located satisfies the condition of utilizing the fast service channel for short message reception during the process of receiving the short message by the receiving party, and when satisfied, just establish the fast service channel for the receiving party (For example, establish FACCH), so as to jump from the independent dedicated control channel to the established fast service channel to receive short messages as soon as possible, speed up the speed of short message reception, reduce the time of short message reception, and thus reduce the problem of incomplete reception of short messages and improve the quality of short messages. Service reliability and user experience satisfaction; it can also provide more remaining SDCCH resources for other terminals, reducing the probability of SDCCH congestion.

In order to better understand the present invention, the present invention will be further described below in conjunction with specific implementation processes.

When the sender sends a text message, the sending process is as follows:

Receive the channel request sent by the sender;

Determine whether the cell where the sender is currently located satisfies the conditions for establishing a fast traffic channel for the sender, and if so, establish a fast traffic channel for the sender;

The sender sends the short message through the established fast service channel.

Please refer to Figure 3 for details of the above process, including:

Step 301: The sender MS initiates the process of sending a short message, and sends a channel request to the sender BSC through the sender BTS to request a channel;

Step 302: After receiving the request channel, the sender BSC judges whether the "short message fast sending switch" of the cell where the sender MS is currently located is turned on, that is, judges whether the traffic channel of the cell is rich; if so, go to step 303; otherwise, Go to step 309;

Step 303: The sender BSC judges whether the value of RA in the request channel is a preset value, that is, 0001****, if yes, go to step 304, otherwise, go to step 309;

Step 304: The sender BSC sends an instruction to establish a fast traffic channel to the sender BTS;

Step 305: after the sender BTS receives the instruction to set up the fast traffic channel, activate a traffic channel as the fast traffic channel, which may be preferably FACCH in this embodiment; and after the establishment is successful, feed back the fast traffic channel establishment success message to the sender BSC ,

Step 306: After receiving the fast traffic channel establishment success message, the sender BSC sends a fast traffic channel assignment message to the sender MS through the sender BTS;

Step 307: The sender MS establishes a control channel (Lapdm, Link Access Protocol on the Dm channel) link on the assigned fast traffic channel, as follows: first establish a Lapdm link with SAPI=0, and then establish a Lapdm link with SAPI=3 The BTS will return UA (Unnumbered Acknowledge) frames for the two SABM (Set Asynchronous Balanced Mode) frames respectively, and report the establishment instructions to the BSC respectively;

Step 308: After the control channel link is established, the sender MS occupies the traffic channel to exchange information with the network side on the fast traffic channel (such as FACCH) in the form of frame stealing, and sends the short message through BSS (Base Station Subsystem,) and MSC to the SMS center.

Step 309: The sender BSC sends an instruction to establish an SDCCH to the sender BTS, and sends a short message through the SDCCH channel.

When the recipient receives the SMS, the receiving process is as follows:

After receiving the paging message sent by the mobile switching center, the receiver sends a channel request;

Establish and assign an independent dedicated control channel to the receiver;

In the process of establishing a control channel link on the assigned independent dedicated control channel, judge whether the cell where the receiver is currently located satisfies the conditions for establishing a fast traffic channel for the receiver, if so, establish a fast traffic channel for the receiver, and go to the next step One step; otherwise, the independent dedicated control channel is still used to receive the short message;

The receiving party jumps from the independent dedicated control channel to the fast service channel, and receives the short message through the fast service channel.

Please refer to Figure 4 for details of the above process, including:

Step 401: After the short message center receives the short message from the sender MS, the receiver MSC sends a paging message to the short message receiver MS;

Step 402: After receiving the paging message, the receiver MS sends a channel request to the receiver BSC through the receiver BTS to ask for a channel;

Step 403: After the receiver BSC receives the request channel, since the RA value of the request channel is not 0001**** at this time, even if the "short message fast sending switch" of the cell where the receiver MS is located at this time is on, it cannot Activate the traffic channel for the receiver MS; therefore, at this time, the receiver BSC directly issues an SDCCH establishment instruction to the receiver BTS;

Step 404: After the receiver BTS activates the SDCCH, it feeds back the SDCCH establishment success message to the receiver BSC;

Step 405: After receiving the SDCCH establishment success message, the receiver BSC sends an SDCCH assignment message to the receiver MS through the receiver BTS;

Step 406: The receiver MS establishes a control channel on the assigned SDCCH, specifically to first establish a Lapdm link with SAPI=0, and after the establishment, the receiver MSC receives the short message data RP_DATA sent by the short message center, and the receiver MSC will receive The received RP_DATA is sent to the receiver BSC;

Step 407: The receiving party BSC judges that the received data is RP_DATA, and then further judges whether the "short message fast sending switch" of the cell where the receiving party MS is currently located is turned on, that is, judges whether the current cell can establish a fast service channel for the receiving party to receive short messages , if yes, go to step 408; otherwise, go to step 413;

Step 408: The receiver BSC sends an instruction to establish a fast traffic channel to the receiver BTS;

Step 409: After receiving the instruction to establish a fast traffic channel, the receiver BTS activates a traffic channel as a fast traffic channel, which may also be preferably FACCH in this embodiment; and after the establishment is successful, feeds back the successful establishment of the fast traffic channel to the receiver BSC information;

Step 410: After receiving the fast traffic channel establishment success message, the receiver BSC sends a fast traffic channel assignment message to the receiver MS through the receiver BTS;

Step 411: After receiving the fast traffic channel assignment message on the SDCCH, the receiver MS jumps to the assigned fast traffic channel, that is, the FACCH, and establishes a control channel (Lapdm, Link Access Protocol on the Dm channel) link on the FACCH, specifically As follows: the receiver MS sends a SABM (SAPI=0) frame to the receiver BTS on the FACCH channel, and the receiver BTS returns a UA frame (SAPI=0) to the receiver MS after receiving it, and reports the establishment instruction to the receiver BSC ( SAPI=0). Then the receiver BSC initiates the Lapdm link establishment process with SAPI=3, that is, sends a link establishment request to the receiver BTS. The receiver BTS sends a SABM frame (SAPI=3) to the receiver MS after receiving it, and the receiver MS responds with a UA frame (SAPI=3) after receiving the SABM frame. After receiving the UA frame, the base station responds to the receiver BSC with an establishment confirmation;

Step 412: After the control channel link is established, the receiver MS occupies the traffic channel to exchange information with the network side on the fast traffic channel (such as FACCH) in the form of frame stealing, and receives the message sent by the sender through the short message center, MSC, and BSS. Short message: After the receiver MS successfully jumps to the fast service channel, it is initiated by the receiver BSC and executes the SDCCH channel release process together with the BTS.

Step 413: The receiver MS continues to initiate the Lapdm link establishment process with SAPI=3 on the SDCCH, and receives the short message through the SDCCH channel.

For a better understanding of the present invention, the following fast traffic channel is FACCH as an example to further illustrate the present invention: the description of the setting of "short message fast transmission switch", for the sake of convenience, below with the sub-district where the sender MS and the receiver MS are located All TCH channels are idle as an example for illustration. It should be understood that in actual situations, the number of idle TCH channels/the number of configured TCH channels in a cell is not necessarily 1, which is just a special case and should not be used as a limitation of the present invention.

Assume that the sender MS is in cell A and the receiver MS is in cell B. The "SMS fast sending switch opening threshold" of cell A and cell B is 2/3. The number of TCH idle channels in cell A/the number of configured TCH channels=1, and the number of TCH idle channels in cell B/the number of configured TCH channels=1. Then the channel state of cell A and cell B is greater than the "opening threshold for fast message sending switch". Therefore, the parameter "SMS fast sending switch" of cell A is turned on, and the NECI value of cell A is 1; at the same time, the parameter "Short message fast sending switch" of cell B is turned on, and the NECI value of cell B is 1.

Based on the above settings, the process of sending SMS by the sender is as follows:

Step 501: The mobile station MS is in cell A, initiates the process of sending a short message, and sends a channel request to cell A;

Step 502: BSC receives the request channel, judges that the parameter "SMS fast sending switch" of the cell A where the sender is located is on, and analyzes that the value of RA (Random Access Information) in the channel request is 0001****. Then the BSC directly requests the BTS to activate a TCH channel, and the BTS activates the TCH channel successfully. The BSC issues an immediate assignment message to the MS;

Step 503: The MS initiates layer 2 (Lapdm) link establishment with SAPI=0 on the FACCH channel. BTS returns UA frame (SAPI=0), and reports establishment indication to BSC (SAPI=0);

Step 504: MS initiates layer 2 (Lapdm) link establishment with SAPI=3 on FACCH channel, BTS returns UA frame (SAPI=3), and BSC reports establishment instruction (SAPI=3);

Step 505: The MS sending the short message occupies the TCH channel, exchanges information with the network side on the FACCH channel in the form of frame stealing, and finally the short message reaches the short message center through the BSS subsystem and the MSC;

Step 506: The sending of the short message is completed, followed by the TCH channel release process, which will not be repeated here.

The process of receiving SMS by the receiver is as follows:

Step 601: the network sends a paging message to the receiving MS;

Step 602: The recipient MS sends a channel request to cell B to respond to paging;

Step 603: The BSC receives the channel request and requests the BTS of the cell B to activate an SDCCH channel. After the SDCCH channel is successfully activated, the BSC sends an immediate assignment to the MS;

Step 604: After receiving the immediate assignment, the recipient MS performs layer 2 link establishment (SAPI=0) on the SDCCH channel, and the L3 reason is paging response. The base station sends the establishment indication to the BSC. BSC reports L3 content "paging response" to MSC;

Step 605: The MSC sends a short message RP_DATA to the BSC. After receiving the short message, the BSC judges that the parameter "short message fast sending switch" of cell B is on, and immediately asks the BTS of the cell to activate a TCH channel (do not continue to initiate on the SDCCH channel) SAPI=3 Lapdm link establishment process), after the BTS is activated successfully, the BSC sends an assignment command to the MS to assign the latest TCH channel to the MS;

Step 607: The MS initiates a layer 2 (Lapdm) link establishment procedure with SAPI=0 on the FACCH channel. BTS returns UA frame (SAPI=0), and reports establishment indication to BSC (SAPI=0);

Step 608: The BSC initiates a layer 2 (Lapdm) link establishment process with SAPI=3 on the FACCH channel. That is, the BSC sends a setup request to the BTS, and the BTS sends a SABM frame (SAPI=3) to the receiver MS after receiving it, and the receiver MS responds with a UA frame (SAPI=3) after receiving it. BTS sends establishment confirmation to BSC after receiving UA frame;

Step 609: After the BSC receives the establishment confirmation (SAPI=3), the BSC sends a short message to the BTS. The receiver MS occupies the TCH channel to exchange information with the network side on the FACCH channel in the form of stealing frames;

It is worth noting that after the BSC receives the establishment confirmation (SAPI=3), indicating that the MS successfully jumps to the TCH channel, the BSC initiates and executes the SDCCH channel release process together with the BTS. Since the SDCCH channel release process and the short message transmission process are executed in parallel, it will not increase the time;

After the short message is sent, the TCH channel release process follows.

In order to have a more intuitive understanding that the present invention utilizes the fast service channel to receive and send short messages to save time, the present invention will be further described below in comparison with the prior art:

The existing short message sending/receiving process is carried out on the SDCCH channel. Since the position of the SDCCH channel on the 26 multiframe is fixed, a packet of data is transmitted (from sending the I frame to receiving the RR frame response from the network, or from the network to It is relatively slow to send an I frame to receive an RR frame response from the MS. The present invention transmits signaling on the FACCH channel by stealing frames, and the speed of transmitting a packet of data will be greatly improved. Moreover, as the content of the short message is longer, the Um port needs to transmit more data packets, and the time saved is longer. E.g:

It generally takes 51 frames to transmit a packet of data on the SDCCH channel in the original process; however, it generally takes 26 frames to transmit a packet of data on the FACCH channel in this patent, and the speed can be increased by about 1 time.

The following are examples for the SMS sending process and the SMS receiving process.

1) For SMS sending process

According to Fig. 3 and the above-mentioned introduction, it can be known that the short message sending method provided by the present invention does not add additional signaling flow (the newly added one is only judgement), and each time a packet of data is sent (the terminal sends an I frame to receiving an RR frame response), in the FACCH Compared with the SDCCH channel, it can save 26 frames and about 115ms time. Take the sender MS editing a standard short message (70 Chinese characters) as an example, a standard short message generally needs 3 packets to be sent at the Um port. Then, combined with the above data, the sender can save about 350ms. If the sender is a long text message (set to K Chinese characters, K>70, and K is an integer multiple of 70), then the sender can save about 115*3*([K/70]+1)ms, of which , [] is rounding operation.

2) SMS receiving process

According to Fig. 4 and the above-mentioned introduction, although the short message receiving method provided by the present invention has increased several signaling processes relative to the existing short message receiving method, the time reduced by transmitting the short message content on the FACCH channel can fully offset the newly added signaling process Increased time, but also save some time. This is because, through the statistics of experimental data, TCH channel activation~TCH channel activation confirmation will increase the time by no more than 20~100ms, and assigning commands~establishing instructions (SAPI=0) will increase the time by 200~300ms, but the SAPI on the FACCH channel =3 Layer 2 link establishment will shorten the time by about 200ms. Therefore, under normal circumstances, the time from the successful activation of the TCH channel to the successful establishment of the Lapdm link by the receiving MS on the FACCH channel should not exceed 200 ms. To sum up, take the receiver MS receiving a standard SMS (70 Chinese characters) as an example, since it generally takes about 3 packets at the Um port to complete the reception (it can save about 350ms), then the signaling process of this patent is on the FACCH channel The reduced time for delivering the content of the short message is about 150ms. If you receive a long text message (set to K Chinese characters, K>70, and K is an integer multiple of 70), the recipient can save about 115*3*([K/70]+1)-200ms Time, where [] is rounding operation.

Therefore, according to the above-mentioned analysis, the present invention can re-establish a fast service channel to send and receive short messages when the current service channel of the sender and the receiver is rich, and can shorten the time for sending and receiving short messages to a large extent, so it can Reduce the failure of sending or receiving incomplete long text messages, and improve the reliability of SMS services.

At the same time, the present invention uses the fast service channel of the cell to receive and send short messages, which can reduce the time that the short message service occupies the independent dedicated control channel, saves independent dedicated control channel resources for other terminal location updates, calling services, etc., and can reduce the number of independent dedicated control channels. Control the probability of channel congestion and balance the load of independent dedicated control channels and traffic channels, which is more conducive to improving resource utilization.

The above content is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (13)

1. A short message sending method, characterized in that comprising: Receive the channel request sent by the sender; Judging whether the value obtained by dividing the number of idle traffic channels in the cell where the sender is currently located by the number of traffic channels configured in the cell is greater than a first preset threshold value, if so, establishing a fast traffic channel for the sender; The sender sends the short message through the established fast service channel. 2. The short message sending method according to claim 1, wherein, before setting up a fast service channel for the sender, it also includes judging whether the value of the random access information of the channel requested by the channel request is preset value, if yes, establish a fast traffic channel for the sender. 3. short message sending method as claimed in claim 1, is characterized in that, sender sends short message by the quick business channel of setting up and comprises: The sender establishes a control channel link on the fast traffic channel; sends a short message through the established control channel link. 4. The short message sending method according to claim 1, wherein the fast service channel is a fast associated control channel. 5. A short message sending system, characterized in that it comprises a sender's mobile station, a sender's base station controller, and a sender's base transceiver station; The sender mobile station is used to send a channel request to the sender base transceiver station; and after receiving the fast traffic channel assignment message sent by the sender base transceiver station, send the request through the fast traffic channel assigned by the message short message; The base station controller of the sender is used to determine the number of idle traffic channels in the cell where the mobile station of the sender is currently located divided by the number of traffic channels configured in the cell after receiving the channel request sent by the base transceiver station of the sender Whether the value is greater than the first preset threshold value, if yes, send an instruction to establish a fast traffic channel to the base transceiver station of the sender; and receive a fast traffic channel establishment success message fed back by the base transceiver station of the sender Afterwards, sending a fast traffic channel assignment message to the mobile station of the sender through the base transceiver station of the sender; The sending base transceiver station is used to control the base station to send a channel request after receiving the channel request sent by the sending mobile station; and is used to establish a fast traffic channel after receiving the fast traffic channel indication, And feed back a fast traffic channel establishment success message to the base station controller on the sending side. 6. The short message sending system as claimed in claim 5, wherein, the base station controller of the sending party is also used for judging that the current sub-district of the mobile station satisfies the condition for setting up a fast traffic channel for the mobile station, and then The new cause indication parameter of the cell is set to 1. 7. The short message sending system according to claim 5 or 6, wherein the base station controller of the sender is also used to judge the channel before issuing an instruction to set up a fast service channel to the base transceiver station of the sender Whether the value of the random access information in the request is a preset value, and if so, send an instruction to establish a fast traffic channel to the sending base transceiver station. 8. A short message receiving method, characterized in that comprising: After receiving the paging message, the receiver sends a channel request; Establish and assign an independent dedicated control channel to the receiver; In the process of establishing a control channel link on the assigned independent dedicated control channel, determine whether the cell where the recipient is currently located meets the conditions for establishing a fast traffic channel for the recipient, and if so, establish a fast traffic channel for the recipient ; The receiving party jumps from the independent dedicated control channel to the fast service channel, and receives the short message through the fast service channel. 9. Short message receiving method as claimed in claim 8, it is characterized in that comprising: in the process of setting up the control channel link on the independent dedicated control channel of assignment, judge whether the sub-district where the receiving party currently resides satisfies the establishment of fast service for the receiving party Channel conditions include: In the process of establishing the control channel link, receive short message data; Determine whether the value obtained by dividing the number of idle traffic channels in the cell where the receiver is currently located by the number of configured traffic channels is greater than the second preset threshold value, and if so, consider that the cell where the receiver is currently located satisfies the need to establish a fast channel for the receiver. The condition of the traffic channel. 10. The short message receiving method as claimed in claim 8 or 9, wherein the receiving party jumps from the independent dedicated control channel to the fast service channel, and receiving the short message through the fast service channel comprises: The receiver jumps to the fast traffic channel, establishes a control channel link on the fast traffic channel, and receives the short message through the established control channel link. 11. A short message receiving system, characterized in that it comprises: a receiver mobile station, a receiver base station controller, a receiver base station transceiver platform; The receiver mobile station is used to send a channel request to the receiver base station controller through the receiver base station transceiver platform after receiving the paging message; and is used to receive the independent message sent by the receiver base station controller After the dedicated control channel assignment message, establish a control channel link on the independent dedicated control channel assigned by the message; and after receiving the fast traffic channel assignment message sent by the base station controller of the receiver, use the fast The business channel receives short messages; The receiver base station controller is used to issue an independent dedicated control channel indication to the receiver base station transceiver platform after receiving the channel request; and is used to receive the receiver base station transceiver platform feedback independent dedicated control channel establishment After the success message, send an independent dedicated control channel assignment message to the receiving mobile station through the receiver's base station transceiver platform; and during the process of establishing a control channel link on the assigned independent dedicated control channel, determine Whether the cell where the mobile station of the receiver is currently located satisfies the conditions for establishing a fast traffic channel for the receiver, and if so, sends a fast traffic channel indication to the transceiver platform of the base station of the receiver; and is used for receiving the base station of the receiver After the fast traffic channel establishment success message fed back by the transceiver platform, the fast traffic channel assignment message is sent to the receiver mobile station through the receiver base station transceiver platform; The receiver's base station transceiver platform is used to establish an independent dedicated control channel after receiving the independent dedicated control channel indication, and feeds back a successful independent dedicated control channel establishment message to the receiver's base station controller; and is used to receive the independent dedicated control channel After the fast traffic channel is indicated, the fast traffic channel is established, and a fast traffic channel establishment success message is fed back to the receiver base station controller. 12. The short message receiving system according to claim 11, characterized in that it comprises: the base station controller of the receiving party judges whether the cell where the mobile station of the receiving party is currently located satisfies the conditions for establishing a fast traffic channel for the mobile station of the receiving party including : Judging whether the value obtained by dividing the number of idle traffic channels in the cell where the receiver is currently located by the number of configured traffic channels is greater than a second preset threshold value, and if so, consider that the cell where the receiver is currently located meets the requirements for the mobile station of the receiver. Conditions for establishing a fast traffic channel. 13. The short message receiving system as claimed in claim 11 or 12, wherein, the receiver mobile station jumps from the independent dedicated control channel to the fast traffic channel, and receives the short message through the fast traffic channel include: The receiver mobile station jumps to the fast traffic channel, establishes a control channel link on the fast traffic channel, and receives the short message through the established control channel link.