CN100518373C - Method for shortening called built-up time of mobile communication system - Google Patents

Abstract

The present invention proposes a method for shortening the called establishment time of the mobile communication system. After the core network receives the incoming call, it sends a paging message containing the identity number of the called mobile terminal to the base station controller, which also includes the following steps: The core network obtains the service type of the called service from the control signaling of the incoming call, adds the service type to the paging message, and sends it to the base station controller; the base station controller binds and stores the service type and the identity number, through Send a paging request message containing an identity number to page the mobile terminal; after receiving the paging request message, the mobile terminal adds the identity number to the wireless signaling connection request message and sends it back to the base station controller; the base station controller obtains the paging request message The identity number in the wireless signaling connection request message finds the corresponding service type of the called service, and then establishes a wireless signaling connection according to the service quality of the service type to reserve wireless resources for the called service.

Description

A method for shortening the called establishment time of mobile communication system

technical field

The invention relates to the process of establishing a called party in a mobile communication system, in particular to a method for shortening the time for establishing a called party in a mobile communication system.

Background technique

With the development of mobile communication, more and more services have been applied. In order to support various services, the radio resource management in mobile communication has added a lot of flexibility so as to improve the utilization efficiency of precious radio resources. This flexibility is at the cost of increasing the complexity of call control signaling, thus increasing the call setup time, including calling and called.

From the perspective of the base station controller, the general call process can have the following steps: paging process (only applicable to the called party), wireless signaling connection establishment process, non-access stratum process (including business request, service quality ( Hereinafter referred to as QoS) negotiation process, and security-related process, etc.), wireless service connection establishment process, etc.

There is already a solution to shorten the call establishment process of the calling party. The main method is that when the terminal starts the wireless signaling connection establishment process, if the QoS flexibility of the service to be established is very low, then the wireless signaling The service type of the call is attached to the base station controller in the connection request message. The base station controller can deduce the QoS of the service by calling the service type, so as to reserve a certain radio resource for the subsequent wireless service connection while establishing the wireless signaling connection. When the call flow proceeds to the wireless service connection establishment process, because the wireless resources have been reserved, the real wireless service connection establishment process is greatly simplified. Since the wireless service connection establishment process is the most complicated and time-consuming process in the entire call process, the simplification of this process can save a large part of the call establishment time.

FIG. 1 is a schematic diagram of an optimized mobile terminal calling process in the known technology. As shown in the figure, the following steps are included:

Step S101, adding call service type information in the wireless signaling connection request message sent by the mobile terminal to the base station controller;

Step S102, the base station controller sends a wireless signaling connection establishment message to the mobile terminal according to the call service type and the QoS of the service, establishes a wireless signaling connection and reserves wireless resources for the service;

Step S103, the mobile terminal responds that the wireless signaling connection is established successfully, and the service wireless resource is reserved successfully;

Step S104, performing non-access stratum signaling interaction between the established wireless signaling connection and the core network, including service request, service quality negotiation process and security related process.

Step S105, the core network sends a service assignment request message to the base station controller, requesting to establish a wireless service connection;

Step S106, the base station controller establishes the logical channel of the service, that is, corresponds the service connection required by the core network with the reserved wireless resources;

Step S107, the mobile terminal responds that the logical channel of the wireless service has been established successfully;

In step S108, the base station controller responds that the core network service connection is established successfully.

But at present, this method of shortening the caller's establishment process time cannot be applied to the called situation. This is because when calling, the terminal that initiates the service is very clear about the service type of the call that needs to be initiated, such as voice call or Internet browsing service, etc., so it can notify the base station controller through the radio resource layer protocol, but the called terminal Sometimes, the terminal cannot directly know the service type, and at most obtains the paging reason from the paging message. Because the main function of paging is generally to wake up an idle terminal to initiate a wireless signaling connection, the paging reason in the paging message of the existing system does not have the content of the calling service type. An improved method is to directly add the call service type information from the core network to the paging message on the wireless interface, but because it involves the modification of the wireless interface protocol, its usable range and increased complexity make such a modification difficult to realize.

Contents of the invention

In order to solve the above problems, the object of the present invention is to propose a method for shortening the call establishment time of the mobile communication system. The base station controller prepares wireless resources for wireless services in advance during the establishment of wireless signaling connections, so as to reduce the time in the establishment of wireless services.

In order to achieve the above object, the present invention proposes a method for shortening the called establishment time of the mobile communication system. After the core network receives the incoming call, it sends a paging message containing the identity number of the called mobile terminal to the base station controller, wherein, Also includes the following steps:

Step 1, the core network obtains the service type of the called service from the control signaling of the incoming call, adds the service type to the paging message, and sends it to the base station controller;

Step 2, the base station controller binds and stores the service type and the identity number, and pages the called mobile terminal by sending a paging request message containing the identity number;

Step 3, the called mobile terminal obtains the identity number from the received paging request message, adds it to the wireless signaling connection request message, and sends it back to the base station controller;

Step 4, the base station controller obtains the identity number from the received wireless signaling connection request message, finds the corresponding service type of the called service, and according to the service quality of the service type, communicates with the The called terminal establishes a wireless signaling connection, and reserves wireless resources for the called service.

In the above method for shortening the set-up time of the called party in the mobile communication system, the service type of the called service belongs to the circuit switching domain or the packet switching domain.

In the above method for shortening the call setup time in the mobile communication system, the paging message further includes: a service domain message, a paging reason message containing service category information and a paging area message.

In the above method for shortening the called establishment time of a mobile communication system, wherein the identity number of the called mobile terminal includes a permanent identity number or a temporary identity number, and when the identity number is a temporary identity number, the second step specifically includes The following steps:

Step 41, adding to the temporary identity number a restriction parameter that makes the temporary identity number uniquely valid;

Step 42, binding the added temporary identity number with the service type and storing it in the base station controller;

Step 43: Send a paging request message containing the temporary identity number of the additional restriction parameter to page the called mobile terminal.

The above-mentioned method for shortening the called establishment time of the mobile communication system, wherein said step 2 also includes the following steps:

Step 51, setting a time window for keeping the binding relationship between the identity number and the service type valid;

Step 52: When the predetermined time of the time window is exceeded, the binding relationship between the identity number and the service type is invalidated and deleted from the base station controller.

The above-mentioned method for shortening the called establishment time of the mobile communication system, wherein, said step 4 also includes:

When the corresponding service type of the called service is found according to the identity number, the step of setting the time window is canceled.

In the above-mentioned method for shortening the call setup time of a mobile communication system, the one paging request message may simultaneously contain the identity numbers and related information of one or more mobile terminals.

The above-mentioned method for shortening the called establishment time of the mobile communication system, wherein said step three specifically includes the following steps:

Step 81, the mobile terminal receives its own paging request message by detecting one or more identity numbers in the paging request message;

Step 82, the mobile terminal responds to the paging, and sends a wireless signaling connection request message to the base station controller, and the wireless signaling connection request message includes the identity number of the called mobile terminal in the paging request message. same ID number.

The present invention realizes the acquisition of the called service type by the base station controller by modifying the paging message of the I interface and related operations in the terminal and the base station controller, so that the wireless signaling connection establishment process of the called party can be expanded to simultaneously The process of reserving service radio resources greatly shortens the call establishment time.

Description of drawings

Fig. 1 is the schematic flow chart of the mobile terminal calling after known technology optimization;

Fig. 2 is the schematic flow chart of the mobile terminal being called after the optimization of the present invention;

Fig. 3 is a schematic diagram of the specific application of the present invention in WCDMA.

Detailed ways

Specific embodiments are described in detail as follows in conjunction with accompanying drawings:

Fig. 2 is a schematic flow diagram of an optimized mobile terminal being called in the present invention. As shown in the figure, it specifically includes the following steps:

In step S201, after receiving an incoming call, the core network obtains the service type of the call from the control signaling, and then adds the call service type to the paging message of the I interface and sends it to the base station controller. The terminal's identity number must be included in the paging message. The paging message may also include other necessary information.

Step S202, the base station controller determines an identity number to be sent to the terminal, and then associates the call service type with the identity number of the terminal, and stores this correspondence in the base station controller, and sets a protection timer Tp, The protection timer sets a time window, and the corresponding relationship is kept valid within the predetermined time window, and when the predetermined time window exceeds the time window, the corresponding relationship is invalidated and deleted from the base station controller. Then the paging request message through the U interface is invalid in the paging area and is deleted from the base station controller. Then the terminal is paged in the paging area through the paging request message of the U interface. The paging request message definitely includes the terminal's identity number, but does not include the calling service type. The paging request message may also include other necessary information. A paging request message can include the identity numbers and related information of one or more mobile terminals at the same time.

Step S203, after the terminal receives its own paging request message, it obtains the terminal's identity number from the message, and backfills the identity number in the wireless signaling connection request message, and sends it to the base station controller. The message may also include other necessary information elements, and the ID number backfilled must be exactly the same as the ID number in the paging request message.

In step S204, after receiving the wireless signaling connection request message, the base station controller compares the terminal identity number in the message with the corresponding relationship between the terminal identity number and the call service type reserved by the base station controller. If found, just obtain the called service type of this time, kill the protection timer Tp that is set at the same time. The base station controller establishes a wireless signaling connection through a wireless signaling connection establishment message according to the QoS (Quality of Service) of the service type, and reserves wireless resources for the service; if not found, it will be processed according to the existing call flow.

In step S205, the mobile terminal responds with a wireless signaling connection establishment complete message, indicating that the wireless signaling connection is successfully established, and the wireless resource has also been successfully reserved for services.

Step S206, perform non-access stratum call establishment, QoS negotiation process or security-related processes, etc.

Step S207, the core network sends a wireless service connection establishment request message, requesting the base station controller to establish a wireless service connection

Step S208, the base station controller uses the wireless service connection establishment message to establish the logical channel of the service, that is, associates the wireless service connection required by the core network with the reserved wireless resources, and notifies the terminal that the service logical channel takes effect immediately.

In step S209, the mobile terminal completes the establishment process of the service logical channel, and notifies the base station controller of the established service logical channel.

In step S210, the base station controller notifies the core network that the wireless service connection is successfully established.

Fig. 3 is a schematic diagram of the specific application of the present invention in WCDMA. In the existing WCDMA system, the main network elements include core network, base station controller (RNC, Radio Net Controller), base station and terminal. The paging message (PAGING) of the interface (abbreviated as Iu interface) between the core network and the RNC includes the mandatory terminal permanent identity number, service domain, and optional paging reason (packet type information. So normal During the called process, neither the terminal nor the base station controller can know the call service type during the establishment stage of the radio connection (RRCConnection, Radio Resource Control Connection).

If the paging message of the Iu interface contains a temporary identity number, such as TMSI (TemporaryMobile Subscriber Identity, temporary mobile subscriber identity) or P-TMSI (Packet-Temporary Mobile Subscriber Identity, group temporary mobile subscriber identity), then in The identity number stored in the base station controller and exchanged in the wireless interface (referred to as Uu interface) message refers to the temporary identity number plus the only valid restriction parameters, such as location area (LAC, Location Area Code) or routing area (RAC , Routing Area Code).

In the present invention, in order to reserve wireless resources during the wireless connection establishment phase, a "call service type" information element will be added to the PAGING message of the Iu interface. As shown in the figure, it specifically includes the following steps:

In step S301, after receiving an incoming call, the core network obtains the service type of the call from the control signaling, and then adds the call service type to the PAGING message on the Iu interface and sends it to the RNC. The service type may belong to the circuit switched domain (abbreviated as CS domain), or may belong to the packet switched domain (abbreviated as PS domain).

Step S302, the RNC decides an identity number to be sent to the terminal, then binds the call service type with the identity number of the terminal, stores the binding correspondence in the RNC, and sets a protection timer Tp to Maintain the validity of the corresponding relationship, that is, keep the binding relationship valid within the time window set by the timer, and invalidate the corresponding relationship after exceeding the predetermined time window, and delete it from the base station controller. Then, the terminal is paging through the existing PAGING TYP1 (paging type 1) message, and the call service type is not included in the message, that is, the existing PAGING TYPE1 message is not modified.

Step S303, after the terminal receives its own PAGING TYP1 message, it obtains the terminal's identity number from the message, and backfills the identity number in the Initial UE Identity (initial terminal identity number) of the RRC connection request (wireless connection request) message In the information element, it is sent to the RNC. Other information units in the message are processed according to the existing protocol.

Step S304, after the RNC receives the RRC connection request message, it compares the terminal identity number in the message with the corresponding relationship between the terminal identity number and the call service type reserved by the RNC. If found, just obtain the called service type of this time, kill the protection timer Tp that is set at the same time. According to the QoS of the service type, the RNC establishes the wireless signaling bearer through the RRC connection setup (wireless connection setup) message, and reserves the radio channel resources for the service; if not found, it will be processed according to the existing call flow. The wireless connection establishment process can adopt default configuration, detailed configuration or other parameter configuration methods. The physical layer technology can be FDD (Frequency Division Duplex, frequency division duplex), TDD (Time Division Duplex, time division duplex) and any other applicable wireless multiple access technology.

In step S305, the terminal responds with an RRC connection setup complete (wireless connection setup complete) message.

Step S306, call establishment at the non-access stratum, QoS negotiation process or security-related processes, etc.

Step S307, the core network sends a radio access bearer establishment request message, requesting the RNC to establish a radio service bearer

Step S308, the RNC adopts the asynchronous reconfiguration method to establish a service logical channel, that is, associates the radio access bearer required by the core network with the reserved radio resources, and notifies the terminal that the service logical channel takes effect immediately. This step may also include configuration content stipulated by other protocols.

In step S309, the terminal completes the establishment process of the service logical channel, and notifies the RNC of the established service logical channel.

In step S310, the RNC notifies the core network that the radio access bearer is established successfully.

After receiving the request message from the core network to establish a wireless service connection, the base station controller completes the establishment process of the service logic channel on the wireless signaling connection. Because the wireless resources of the wireless service connection have been reserved, the establishment message of the wireless service connection is very small, and the establishment process becomes very simple, thereby greatly shortening the establishment time of the wireless service connection.

Certainly, the present invention also can have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these Corresponding changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (8)

1. A kind of method that shortens mobile communication system called set-up time, after core network receives incoming call, sends the paging message that contains the identity number of called mobile terminal to base station controller, it is characterized in that, also comprises the following steps: Step 1, the core network obtains the service type of the called service from the control signaling of the incoming call, adds the service type to the paging message, and sends it to the base station controller; Step 2, the base station controller binds and stores the service type and the identity number, and pages the called mobile terminal by sending a paging request message containing the identity number; Step 3, the called mobile terminal obtains the identity number from the received paging request message, adds it to the wireless signaling connection request message, and sends it back to the base station controller; Step 4, the base station controller obtains the identity number from the received wireless signaling connection request message, finds the corresponding service type of the called service, and according to the service quality of the service type, communicates with the The called mobile terminal establishes a wireless signaling connection, and reserves wireless resources for the called service. 2. The method for shortening the called establishment time of the mobile communication system according to claim 1, characterized in that, the service type of the called service belongs to the circuit switching domain or the packet switching domain. 3. The method for shortening the called setup time of mobile communication system according to claim 1, characterized in that, the paging message also includes: service domain message, paging reason message and paging area message, wherein the paging message The call reason message contains service class information. 4. The method for shortening the called establishment time of the mobile communication system according to claim 1, wherein the identity number of the called mobile terminal comprises a permanent identity number or a temporary identity number, and when the identity number is a temporary identity number number, the second step specifically includes the following steps: Step 41, adding to the temporary identity number a restriction parameter that makes the temporary identity number uniquely valid; Step 42, binding the added temporary identity number with the service type and storing it in the base station controller; Step 43: Send a paging request message containing the temporary identity number of the additional restriction parameter to page the called mobile terminal. 5. the method for shortening mobile communication system called establishment time according to claim 1, is characterized in that, described step 2 also comprises the following steps: Step 51, setting a time window for keeping the binding relationship between the identity number and the service type valid; Step 52: When the predetermined time of the time window is exceeded, the binding relationship between the identity number and the service type is invalidated and deleted from the base station controller. 6. the method for shortening mobile communication system called establishment time according to claim 5, is characterized in that, described step 4 also comprises: When the corresponding service type of the called service is found according to the identity number, the step of setting the time window is canceled. 7. The method for shortening the call establishment time of a mobile communication system according to claim 1, characterized in that, said one paging request message can simultaneously contain the identity numbers and related information of one or more mobile terminals. 8. the method for shortening mobile communication system called establishment time according to claim 7, is characterized in that, described step 3 specifically comprises the following steps: Step 81, the mobile terminal receives its own paging request message by detecting one or more identity numbers in the paging request message; Step 82, the mobile terminal responds to the paging, and sends a wireless signaling connection request message to the base station controller, and the wireless signaling connection request message includes the The identity number of the id is exactly the same as the identity number.

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