CN101179843B - A packet switching method and communication device - Google Patents

Abstract

The invention discloses a grouping switch method which essentially means that a judgment step on executing a switch condition is added to a switch process and the current switch initiating or executing is controlled via a pre-placed switch condition. The judgment step may be carried out at any time before the completion of a switch by any related node of the switch like a mobile station, a base station controller or a universal access network controller, etc. The invention avoids an unusual backward and forward switch between the cells according to the judgment of unusual performance by the pre-placed switch condition, and reduces the signaling flow, thereby improving the stability of the service.

Description

A packet switching method and communication device

technical field

The invention relates to the technical field of mobile communication, in particular to a packet switching method and communication equipment. The packet switching method is especially suitable for packet switching between a general access network and a wireless access network.

Background technique

In the mobile communication network, the access network acts as a bridge between the terminal user and the core switching network, and its communication capability directly affects the user's experience of mobile services. With the continuous development of short-distance wireless communication technology, it has attracted more and more attention due to its advantages of high access bandwidth and low communication cost. The way of providing wireless access based on short-distance wireless communication technology in the license-free frequency band is rapidly popularizing, and it coexists with traditional wireless access networks in the local area or even in the metropolitan area. Therefore, traditional wireless access networks, such as the access network (GERAN, GSM EDGE RadioAccess Network) of the Global System for Mobile Communications (GSM, Global System for Mobile communications) and its enhanced data rate version (EDGE, Enhanced Data rate for GSM Evolution) ) and the Universal Access Network (GAN, Generic Access Network) using Unlicensed Mobile Access (UMA, Unlicensed Mobile Access).

In the GAN network, the terminal is connected to the Generic Access Network Controller (GANC, Generic Access Network Controller) through the Generic Access IP Network (Generic Access IP Network) for communication. GANC is equivalent to the base station subsystem (BSS, Base Station) of the GERAN cell. Station Subsystem). Among them, the universal access IP network provides a wireless access point (AP, Access Point). In the whole wireless network, the GANC is generally configured as a GERAN cell in a routing area or a location area, so that switching and roaming between the GAN and the GERAN can be realized.

Due to reasons such as user movement or changes in link conditions, terminals that are performing services need to be handed over between cells to ensure the continuity of terminal communications. The services performed include circuit domain services and packet domain services. A typical situation occurs in a mixed network of GAN and GERAN:

When a mobile station supporting GAN is in a GERAN cell, it will continue to try to discover the GAN network until it finds a GAN service and successfully registers on a GANC. If the GANC is included in the neighbor list of the GERAN cell, the mobile station will include the measurement report of the GAN cell corresponding to the GANC in the measurement report reported thereafter. For a GAN-preferred mobile station, it will immediately send the above measurement report after successfully registering to the GANC; for a GERAN-preferred mobile station, the quality of the GERAN cell will be reduced to To a certain extent, the above-mentioned measurement report is sent. The measurement report will be used as the handover request of the mobile station to start the handover from the GERAN cell to the GAN cell;

When the mobile station is in the GAN cell and performs packet domain services, if a GAN link failure occurs within a short period of time, the mobile station will send a general access packet handover reference message (GA-PSR HANDOVERINFORMATION) as a handover request, triggering the GERAN cell switch. If the GAN link is restored during the process of handover execution until completion, when the mobile station completes the handover and is in the GERAN cell, for the GAN-preferred mobile station, the start condition of GERAN to GAN handover is immediately established, and the mobile station will be in the next A measurement report cycle sends a measurement report including the GAN cell, and requests to switch to the GAN cell. After receiving the measurement report, the BSS executes the handover process to the GAN network. The interval between two handovers is usually only a few hundred milliseconds, and a large amount of signaling is generated.

As mentioned above, according to the existing handover process, only due to short-term link failures and other reasons, it is likely to cause multiple abnormal handovers between cells in a relatively short period of time, resulting in short-term signaling congestion and bringing Incoming service jitter and user service experience degradation.

Contents of the invention

The purpose of the present invention is to provide a grouping switching method and related communication equipment that can avoid abnormal switching between cells.

For reaching the purpose of the present invention, the technical scheme that takes is:

A packet handover method, comprising: a source universal access network controller or a source base station subsystem receives a handover request sent by a mobile station and includes a handover cause identifier, and the source universal access network controller or source base station subsystem records the handover cause identification; the handover condition judgment before the handover process is completed is the handover condition judgment performed by the source universal access network controller or the source base station subsystem during subsequent handover operations, and the handover condition judgment is to judge the Whether the handover reason corresponding to the handover cause identifier still exists, if so, continue to perform the subsequent handover operation, if not, start to cancel the handover.

The subsequent handover operation performed by the source universal access network controller or the source base station subsystem includes: sending a handover request to the serving GPRS support node, receiving a handover request acknowledgment returned by the serving GPRS support node, and sending A handover command is sent to the mobile station, etc.; the handover condition judgment can be performed before any one of the above-mentioned subsequent handover operations, or, the handover condition judgment is before the handover process is completed, after any one of the above-mentioned subsequent handover operations conduct.

Preferably, the source universal access network controller or the source base station subsystem judges the handover condition after receiving the handover request confirmation from the serving GPRS support node, and when it is judged to cancel the handover, Sending a handover cancel message including a handover cancel reason to the serving GPRS support node.

Another packet handover method includes: the mobile station initiates a handover from the source general access network cell or the source wireless access network cell to the target wireless access network cell or the target general access network cell, and sends the handover request to the source general access network cell. The access network controller or the source base station subsystem, and record the handover cause identifier corresponding to the handover cause; the mobile station performs handover condition judgment during the subsequent handover operation process, and the handover condition judgment is to judge the handover cause identifier corresponding to the Whether the switching reason still exists, if so, continue to perform the subsequent switching operation, if not, start to cancel the switching.

The subsequent handover operation performed by the mobile station includes: receiving a handover command sent by the source universal access network controller or the source base station subsystem, sending an access request to the target base station subsystem or the target universal access network controller, etc.; The switching condition judgment may be performed before any one of the foregoing subsequent switching operations, or the switching condition judgment may be performed after any one of the foregoing subsequent switching operations before the completion of the switching process.

Preferably, the mobile station judges the handover condition after receiving the handover command sent by the source universal access network controller or the source base station subsystem, and sends a handover cancel message or A cell change failure message is sent to the source universal access network controller or source base station subsystem, and the source universal access network controller or source base station subsystem continues to perform handover cancellation. The reason for canceling the handover may also be included in the handover cancel message or the packet cell change failure message.

The present invention also provides a communication device, which is a universal access network controller or a base station subsystem, including a message receiving unit, a handover operation unit, and a handover judging unit; A switch request corresponding to a switch cause identifier corresponding to the current switch reason; the switch operation unit is used to initiate and/or execute a switch operation; the switch judgment unit includes a cause identifier storage module and a judgment module, and the cause identifier storage module uses for storing the switching cause identifier; the judging module is used for judging whether the switching reason corresponding to the switching reason identifier stored in the cause identifier storage module still exists during the subsequent switching operation performed by the switching operation unit, and if so, Controlling the switching operation unit to continue to perform subsequent switching operations, otherwise controlling the switching operation unit to start canceling switching.

And, another communication device, the device is a mobile station, including a handover operation unit and a handover judgment unit, the handover operation unit is used to initiate and/or execute a handover operation; the handover judgment unit includes a cause identification storage module and Judging module, the reason identification storage module is used to store the switching cause identification corresponding to the current switching reason when the switching operation unit initiates the switching; the judging module is used to perform the subsequent switching operation process on the switching operation unit Determine whether the switching cause corresponding to the switching cause identifier still exists, if so, control the switching operation unit to continue to perform subsequent switching operations, and otherwise control the switching operation unit to start canceling switching.

By adopting the above technical solution, the beneficial technical effect of the present invention lies in: the present invention adopts the method of adding a handover condition judgment step in the handover process, and judges the abnormality of the handover through the preset handover condition, so as to avoid the occurrence of abnormal back and forth between cells Handover reduces signaling traffic and improves service stability.

Description of drawings

FIG. 1 is a schematic flow chart of a packet handover method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a signaling flow of an application example of the method in Embodiment 1;

FIG. 3 is a schematic flow chart of a packet handover method according to Embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of a signaling flow of an application example of the method in Embodiment 2;

FIG. 5 is a schematic flow chart of a three-packet handover method according to an embodiment of the present invention;

FIG. 6 is a schematic flow chart of a four-packet handover method according to an embodiment of the present invention;

7 is a schematic structural diagram of a communication device according to Embodiment 5 of the present invention;

FIG. 8 is a schematic structural diagram of a mobile station according to Embodiment 6 of the present invention;

FIG. 9 is a schematic structural diagram of a mobile station according to Embodiment 7 of the present invention;

FIG. 10 is a schematic structural diagram of a communication device according to Embodiment 8 of the present invention.

The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

Detailed ways

The present invention provides a packet switching method, the core idea of which is to add a step of judging switching conditions in the switching process, and control the initiation or execution of the current switching through the preset switching conditions. The judging step can be performed at any time before the handover is completed, and can be implemented by any relevant node in the handover, such as a mobile station, a base station controller, or a universal access network controller. The switching conditions for judging can be set according to the actual application. For example, for abnormal switching caused by a short-term fault, the switching condition can be set so that the cause of the switching is not eliminated before the switching is completed. Another example is a more general setting. The handover condition is set such that the mobile station cannot switch back within a certain period of time after it is switched out from a certain cell. The present invention also provides a communication device applied to the above packet switching method. The method and equipment of the present invention will be described in detail below respectively.

Embodiment 1. A packet handover method, the process of which is shown in FIG. 1 , including:

A1. The mobile station sends the handover request containing the handover cause identifier to the source GANC or the source BSS;

The handover can be initiated by the mobile station, for example, the mobile station may find that the quality of the GAN link is degraded through local measurement, and thus send a handover request; the handover may also be initiated by the network side, for example, the source GANC or the source BSS finds that the uplink If there is a link quality failure or the load balancing strategy of the network operator, the mobile station is notified to perform handover through the link quality indication information, and the mobile station sends a handover request based on this information;

In order to achieve the purpose of accurately recording the reasons for the handover, the possible causes of the handover can be classified and identified. For example, for the handover from the GAN cell, the handover reason comparison table shown in the following table can be used:

switch reason identification Description of switching reason 0 Wireless link failure, such as excessive packet loss rate 1 network link problem 2 cell congestion 3 GANC is attacked by the outside world 4 Unacceptable quality of service, such as too much delay 5 GANC cannot provide the service requested by the mobile station 6 The user manually selects the switch 7 Other unknown reasons

A2. After receiving the handover request, the source GANC or source BSS records the handover reason identifier carried therein;

A3. The source GANC or the source BSS judges whether the handover reason corresponding to the handover cause identifier still exists during the subsequent handover operation, if so, continue to perform the subsequent handover operation, if not, cancel the handover;

According to the existing handover process, the subsequent handover operations that may be performed by the source GANC or the source BSS include:

Send a switching request to the serving general packet radio service (GPRS, General Packet Radio Service) support node (SGSN, Serving GPRS Support Node);

receiving a handover request confirmation returned by the SGSN;

sending a handover command to the mobile station;

In the above process, the source GANC or source BSS can judge whether the cause of switching is eliminated at any time, and the judgment is not limited to only one time, it can be set to be executed before/after certain steps, or can be executed in a fixed period Or triggered by related events, such as message arrival, network setting conditions are satisfied, as long as the switch is not completed, the source GANC or source BSS can cancel the switch if the cause of the switch is eliminated at any time;

According to the actual application situation, as a better method, the source GANC or the source BSS can choose to judge the handover condition after receiving the handover request confirmation returned by the SGSN; if it is judged to cancel the handover, the source GANC or the source The BSS can send a handover cancel message to the SGSN to cancel the handover. After receiving the handover cancel message, the SGSN notifies the target BSS or target GANC to release the link resource allocated for the handover. In order to let the SGSN, the target GANC or the target BSS know the reason of the handover failure, the handover cancellation message sent by the source GANC or the source BSS may also include the reason for canceling the handover.

Taking the mobile station located in the GAN cell as an example to initiate handover to the GERAN cell, a signaling process using the above method is given, as shown in Figure 2, including:

a1. The mobile station determines to initiate a handover from the current source GAN cell to the target GERAN cell; the reason for the mobile station to make the above handover judgment may be that the quality of the GAN link is found to be degraded through local measurement, or the general access packet sent by the GANC is received uplink If the link quality indication (GA-PSR UplinkQuality Indication) message detects an uplink quality failure, etc., the handover reason can be indicated by the corresponding identifier in the preset handover reason comparison table; assuming that the current handover cause is an uplink wireless link failure, the corresponding handover Reason ID "0";

a2. The mobile station sends a general access packet handover reference message (GA-PSR Handover Information) containing the handover reason identifier "0" to the source GANC as a handover request to start the handover; the message carries a list of cells and measurements of each cell report, GANC can select the cell with the best signal quality as the target cell according to the receiving level strength of each cell in the report;

a3. The source GANC records the handover reason identifier "0" in the general access packet handover reference message;

The above-mentioned a1~a2 is the handover trigger stage, and the GANC can initiate the handover preparation after determining the target cell;

a4, the source GANC sends a packet handover request (PS Handover Required) message to the SGSN to request handover;

a5, SGSN sends a PS Handover Request (PS Handover Request) message to the target BSS to request the establishment of wireless resources;

a6, the target BSS allocates resources for the mobile station, and sends a PS Handover Request Acknowledge (PS HandoverRequest Acknowledge) message to the SGSN to inform the resource allocation success;

The above a4~a6 are the handover preparation stage, and the handover preparation is completed after the target BSS notifies the SGSN that the resource allocation is successful;

a7. The SGSN sends a PS Handover Required Acknowledge (PS Handover Required Acknowledge) message to the source GANC; through this message, the SGSN informs the source GANC of the radio resources allocated for the mobile station in the target GERAN cell;

a8. The source GANC judges the handover condition, and judges whether the handover reason corresponding to the handover reason flag "0" still exists; if the current uplink has returned to normal, then judges that the handover cause does not exist, and executes a9, otherwise, continues to execute a11;

a9. The source GANC sends a PS Handover Cancel (PS Handover Cancel) message to the SGSN to cancel the handover and carry the reason;

a10. After receiving the packet handover cancellation message sent by the source GANC, the SGSN sends a DELETE BSS PFC message to notify the target BSS to release the link resource allocated for the mobile station.

a11, the source GANC continues to perform subsequent handover operations, sends a general access packet handover command (GA-PSR Handover Command) message to the mobile station, and orders the mobile station to handover to the target GERAN cell;

a12, the mobile station sends a PS Handover Access (PS Handover Access) message to the target BSS;

a13, the target BSS sends packet physical information (Packet Physical Information) to the mobile station;

a14, the mobile station sends a routing area update (Routing Area Update Request) message to the target BSS;

a15. When the target BSS receives the routing area update message of the mobile station or correctly receives the RLC/MAC data block sent by the mobile station, it considers that the handover is complete, and sends a PS HandoverComplete message to the SGSN to end the handover process.

In the specific signaling process above, the source GANC judges the handover condition after receiving the handover request confirmation returned by the SGSN. Of course, the source GANC can also make this judgment at any time after receiving the handover request from the mobile station, as long as the mobile station In the GAN cell, the source GANC can cancel the handover after finding that the cause of the handover is eliminated.

In the above-mentioned embodiments, the method of judging the handover condition by the source GANC or the source BSS during the handover is adopted. Of course, the judgment can also be made by the mobile station, and the example is as follows.

Embodiment 2. A packet switching method, the process of which is shown in FIG. 3 , including:

B1. The mobile station initiates a handover from the source GAN cell or the source GERAN cell to the target GERAN cell or the target GAN cell, and sends the handover request to the source GANC or the source BSS; and records the handover cause identification corresponding to the handover reason, as in the first embodiment Similarly, the handover reason identification can be obtained by classifying and numbering the actual handover reason;

B2. The mobile station judges whether the handover cause corresponding to the handover cause identifier still exists during the subsequent handover operation, and if so, continues to perform the subsequent handover operation, otherwise cancels the handover;

According to the existing handover process, the subsequent handover operations that the mobile station may perform include:

Receive the switching command sent by the source GANC or the source BSS;

Send an access request to the target BSS or target GANC;

In the above process, the mobile station can judge whether the cause of the handover is eliminated at any time, and the judgment is not limited to only one time, it can be set to be executed before/after certain steps, or it can be executed in a fixed period or by the relevant Event-triggered execution, as long as the handover is not completed, the mobile station can cancel the handover if it finds that the cause of the handover is eliminated at any time;

According to the actual application situation, as a better method, the mobile station can choose to judge the handover condition after receiving the handover command sent by the source GANC or the source BSS; if it is judged to cancel the handover at this time, the mobile station can send a handover cancel The message or packet cell change failure message is sent to the source GANC or source BSS, and then the source GANC or source BSS sends a PS Handover Cancel message (PS Handover Cancel) to the SGSN to cancel the handover. After receiving the handover cancel message, the SGSN notifies the target BSS or The target GANC releases the link resources allocated for the handover. In order to let the source GANC or the source BSS know the reason of the handover failure, the handover cancellation message or packet cell change failure message sent by the mobile station may also include the reason for canceling the handover.

Taking the mobile station located in the GAN cell as an example to initiate handover to the GERAN cell, a signaling process using the above method is given, as shown in Figure 4, including:

b1. The mobile station determines to initiate a handover from the current source GAN cell to the target GERAN cell; assuming that the current handover cause is an uplink wireless link failure, the corresponding handover cause flag is "0";

b2. The mobile station sends a general access packet handover reference message to the source GANC as a handover request to start the handover; the message carries a cell list and the measurement report of each cell, and the GANC can select according to the receiving level strength of each cell in the report The cell with the best signal quality is used as the target cell;

b3. The mobile station records the handover cause identifier "0" of the current handover;

b4. The source GANC receives the handover request, and initiates handover preparation after determining the target cell, and the process is the same as a4-a6 in the first embodiment;

b5. The SGSN sends a packet handover request confirmation message to the source GANC; through this message, the SGSN informs the source GANC of the radio resources allocated for the mobile station in the target GERAN cell;

b6. The source GANC sends a general access packet handover command message to the mobile station, ordering the mobile station to switch to the target GERAN cell;

b7. The mobile station judges the handover condition, and judges whether the handover cause corresponding to the handover cause flag "0" still exists; if the current uplink has returned to normal, then judges that the handover cause does not exist, and executes b8, otherwise continues to execute b11;

b8. The mobile station sends a GA-PSR Handover Withdraw (GA-PSR Handover Withdraw) message to the source GANC to notify the handover cancellation;

b9. The source GANC sends a cancel group handover cancel message to the SGSN to cancel the handover and carry the cancellation reason;

b10. After receiving the packet handover cancellation message sent by the source GANC, the SGSN sends a DELETE BSS PFC message to notify the target BSS to release the link resource allocated for the mobile station.

b11. The mobile station performs access to the target GERAN cell, and the process is the same as a12-a15 in Embodiment 1.

In the above-mentioned specific signaling flow, the mobile station judges the handover condition after receiving the general access packet handover command message sent by the source GANC. Of course, the mobile station can also make this judgment at any time after sending the handover request, as long as If the mobile station is still in the GAN cell, it can notify the source GANC to cancel the handover after finding that the cause of the handover is eliminated.

In addition, in the above two embodiments, the handover condition judgment is performed by the network side or the terminal side respectively. In practical applications, the above two judgment methods can also be combined to use the handover condition judgment mechanism on both the network side and the terminal side. One party can initiate a handover cancellation even if it finds that the handover reason is eliminated. In this case, the handover reason needs to be stored by the terminal and sent to the network side through a handover request.

In the above, several schemes of the present invention using whether the reason for handover disappears as the handover condition are given. In addition, the occurrence of abnormal switchback can also be avoided simply by controlling the handover time, examples are as follows.

Embodiment 3, a grouping switching method, the process is shown in Figure 5, including:

C1. After the mobile station switches to the current source GAN cell or the source GERAN cell, it starts the switch timer;

C2. The mobile station determines in the current cell that a new handover needs to be initiated;

C3. The mobile station judges whether the handover timer is timed out, and if so, initiates the handover, and otherwise prohibits the initiation of the handover.

In the above method, a typical situation is that the mobile station is currently located in a GERAN cell, and the target cell for initiating a new handover is a GAN cell; at this time, as a better method, the mobile station prohibits the initiation of handover, which can be done by The method of excluding the target GAN cell from the measurement report reported to the source BSS, so that the measurement report will not trigger the handover process to the GAN cell, achieving the purpose of prohibiting handover.

Of course, the handover timer started by the mobile station may also be associated with a specific cell, and only when the handover object of the mobile station is the associated specific cell, it is judged whether the timer expires. For example, associate the handover timer with the source cell of the previous handover to avoid short-term handover; or associate it with the currently registered GAN cell to avoid frequent handover between the GAN cell and the GERAN cell.

The timing length of the handover timer in the mobile station can be sent to the mobile station by the source BSS through system messages or control signaling; or, it can also be notified to the mobile station by the GANC when the mobile station registers; or, it can also be defined by the mobile station itself.

In the previous embodiment, the mobile station performs handover timing control; the handover timer can also be set on the network side, as shown below.

Embodiment 4, a grouping switching method, the process is shown in Figure 6, including:

D1. After the mobile station switches to the current source GAN cell or source GERAN cell, the source GANC or source BSS starts a handover timer for the mobile station;

D2. The mobile station initiates a new handover in the current cell, and sends the handover request to the source GANC or the source BSS;

D3. The source GANC or the source BSS judges whether the handover timer of the mobile station has expired before performing the subsequent handover operation, and if so, continues to perform the subsequent handover operation, otherwise rejects the handover request.

D1 The source GANC or the source BSS starts the handover timer after the mobile station cuts in.

In the above method, a typical situation is that the mobile station is currently located in a GERAN cell, and the target cell for which it initiates a new handover is a GAN cell; at this time, as a better method, the source BSS rejects the handover request of the mobile station, and can The mobile station is notified through the handover rejection message, which contains the reason for the rejection, such as the handover timer running; or the source BSS may not respond to the handover request, and let the mobile station decide whether to continue to request handover to the GAN cell. The timing length of the timer in the source BSS or source GANC can be defined by the source BSS or source GANC.

In order for the mobile station to know the control of the source BSS or the source GANC to the handover timing, the method of notifying the timer length to the mobile station can be adopted, for example, the source BSS sends it to the mobile station through a system message or control signaling; or, The mobile station may be notified by the GANC when the mobile station registers.

Certainly, the handover timer started by the source BSS or the source GANC may also be associated with a specific cell, and only when the handover object of the mobile station is the associated specific cell, it is judged whether the timer expires. For example, the handover timer is associated with the source cell before the mobile station switches into this cell, so as to avoid switching back in a short time. In addition, a typical situation is that the mobile station is currently located in a GERAN cell, and the handover timer started by the source BSS is associated with the GAN cell currently registered by the mobile station, so as to avoid frequent handover of the mobile station between the GAN cell and the GERAN cell.

In the case that the above-mentioned timer is associated with a specific cell, in order to avoid that the handover request of the mobile station cannot be responded or executed for a long time, a better method is that the source BSS or the source GANC sends a notification message to the mobile station to inform The target object that the mobile station is currently allowed to handover: for example, the source BSS or the source GANC can notify the mobile station that it can re-attempt to handover the associated object of the timer after the timer expires; or, if the mobile station is running during the handover timer , sending handover requests multiple times, the source BSS or source GANC can also notify the mobile station to try to handover to other targets that do not belong to the timer-associated object according to the corresponding adjustment policy.

Embodiments 1, 2, 3 and 4 respectively describe solutions based on two different judgment mechanisms. In fact, the solution of judging whether the handover cause is eliminated and the solution of using a timer can also be used in combination. For example, before the handover is triggered, a timer is used to judge whether to allow the handover trigger; after the handover is triggered, it is judged whether to continue to perform the handover according to the status of the handover reason at any time, and the above schemes can be flexibly used together.

The equipment suitable for the method of the present invention will be described in detail below.

Embodiment 5, a communication device, as shown in FIG. 7, the device may be a general access network controller or a base station subsystem, including a handover operation unit 101, a handover judgment unit 102, and a message receiving unit 103;

A switching operation unit 101, configured to initiate and/or execute a switching operation;

A message receiving unit 103, configured to receive a handover request sent by the mobile station that includes a handover cause identifier corresponding to the current handover cause;

The switching judging unit 102 includes a cause identification storage module 1021 and a judging module 1022,

The cause identification storage module 1021 is used to store the handover cause identification received by the message receiving unit 103;

Judging module 1022, used for judging whether the switching cause corresponding to the switching cause identifier stored in the cause identifier storage module 1021 still exists during the subsequent switching operation performed by the switching operation unit 101, and if so, controlling the switching operation unit 101 to continue performing subsequent switching operations , otherwise control the switching operation unit 101 to cancel the switching.

The communication device in this embodiment can be used as the source GANC or the source BSS in the first embodiment.

Embodiment 6. A mobile station, as shown in FIG. 8 , includes a handover operation unit 201 and a handover judging unit 202;

A switch operation unit 201, configured to initiate and/or execute a switch operation;

The switching judging unit 202 includes a cause identification storage module 2021 and a judging module 2022,

The reason identification storage module 2021 is used for storing the switching reason identification corresponding to the current switching reason when the switching operation unit 201 initiates switching;

Judging module 2022, for judging whether the switching cause corresponding to the switching cause identifier stored in the cause identifier storage module 2021 still exists during the subsequent switching operation performed by the switching operation unit 201, and if so, controlling the switching operation unit 201 to continue performing subsequent switching operations , otherwise control the switching operation unit 201 to cancel the switching.

The mobile station in this embodiment is applicable to the packet handover method in the second embodiment.

Embodiment 7. A mobile station, as shown in FIG. 9 , includes a handover operation unit 301 and a handover judgment unit 302;

A switching operation unit 301, configured to initiate and/or execute a switching operation;

The switching judging unit 302 includes a timer 3021 and a judging module 3022,

The timer 3021 is used to start timing after the switching operation unit 301 completes a switching;

The judging module 3022 is used for judging whether the timer 3021 times out before the handover operation unit 301 initiates a new handover, and if so, controls the handover operation unit 301 to initiate handover, and otherwise prohibits the handover operation unit 301 from initiating handover.

The mobile station in this embodiment is applicable to the packet handover method in the third embodiment.

Embodiment 8. A communication device. As shown in FIG. 10 , the device may be a general access network controller or a base station subsystem, including a handover operation unit 401, a handover judgment unit 402, and a message receiving unit 403;

A switching operation unit 401, configured to initiate and/or execute a switching operation;

A message receiving unit 403, configured to receive a handover request sent by the mobile station;

The switching judging unit 402 includes a timer 4021 and a judging module 4022,

The timer 4021 is used to start the timing of the mobile station after the handover operation unit 401 completes the handover of the mobile station;

The judging module 4022 is used for judging whether the timer 4021 is overtime after the message receiving unit 403 receives the new handover request sent by the mobile station, and if so, controls the handover operation unit 401 to continue performing subsequent handover operations, otherwise controls the handover operation unit 401 Deny the switch request.

The communication device in this embodiment can be used as the source GANC or the source BSS in the fourth embodiment.

The packet switching method and communication equipment provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principles and implementation modes of the present invention. The descriptions of the above embodiments are only used to help understand the methods and methods of the present invention. Its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limit.

Claims (9)

1. a packet switch method is characterized in that, comprising:

The handoff request that comprises the switch reasons sign that source general access network controller or source base station subsystem receiving mobile send;

Described source general access network controller or source base station subsystem write down described switch reasons sign;

Described source general access network controller or source base station subsystem are carried out switching condition and are judged in carrying out follow-up handover operation process, described switching condition judges it is to judge that described switch reasons identifies pairing switch reasons and whether still exists, if then continue to carry out follow-up handover operation, then begin cancellation if not and switch.

2. packet switch method according to claim 1 is characterized in that, the follow-up handover operation that described source general access network controller or source base station subsystem are carried out comprises:

Send a handover request to service general grouping service wireless support node,

Receive the Handover Request Acknowledge that described service general grouping service wireless support node returns,

Send switching command to described travelling carriage;

Described switching condition judgement is carried out before any one in above-mentioned each follow-up handover operation, and perhaps, described switching condition judges that before finishing handoff procedure, any one carries out afterwards in above-mentioned each follow-up handover operation.

3. packet switch method according to claim 2, it is characterized in that: described source general access network controller or source base station subsystem are carried out described switching condition and are judged behind the Handover Request Acknowledge of receiving described service general grouping service wireless support node, when being judged as the cancellation switching, sending the handover cancelling message that comprises the handover cancelling reason and arrive described service general grouping service wireless support node.

4. a packet switch method is characterized in that, comprising:

Travelling carriage is initiated to the switching of Target Wireless Access Network sub-district or target universal access network sub-district from universal access network sub-district, source or wireless access network sub-district, source, handoff request is sent to source general access network controller or source base station subsystem, and write down the switch reasons sign of corresponding switch reasons;

Travelling carriage carries out switching condition and judges in carrying out follow-up handover operation process, described switching condition judges it is to judge that described switch reasons identifies pairing switch reasons and whether still exists, if then continue to carry out follow-up handover operation, then begin cancellation if not and switch.

5. packet switch method according to claim 4 is characterized in that, the follow-up handover operation that described travelling carriage is carried out comprises:

Receive the switching command that described source general access network controller or source base station subsystem send,

Send to insert and ask subsystem of objective base station or target general access network controller;

Described switching condition judgement is carried out before any one in above-mentioned each follow-up handover operation, and perhaps, described switching condition judges that before finishing handoff procedure, any one carries out afterwards in above-mentioned each follow-up handover operation.

6. packet switch method according to claim 5, it is characterized in that: described travelling carriage carries out described switching condition and judges after receiving the switching command that described source general access network controller or source base station subsystem send, when being judged as the cancellation switching, send handover cancelling message or packet cell change failed message to described source general access network controller or source base station subsystem, continue to carry out handover cancelling by described source general access network controller or source base station subsystem.

7. packet switch method according to claim 6 is characterized in that: comprise the reason that cancellation is switched in described handover cancelling message or the packet cell change failed message.

8. communication apparatus, this equipment is general access network controller or base station sub-system, it is characterized in that, comprising: message sink unit, handover operation unit and switching judging unit,

Described message sink unit is used for the handoff request of the switch reasons sign that comprises corresponding current switch reasons that receiving mobile sends;

Described handover operation unit is used for initiating and/or carrying out handover operation;

Described switching judging unit comprises reason mark memory module and judge module,

Described reason mark memory module is used to store described switch reasons sign;

Described judge module, be used for carrying out follow-up handover operation process and judge whether the pairing switch reasons of described reason mark memory module institute's bank switching reason mark still exists in described handover operation unit, continue to carry out follow-up handover operation if then control described handover operation unit, then control described handover operation unit if not and begin the cancellation switching.

9. communication apparatus, this equipment is travelling carriage, it is characterized in that: comprise handover operation unit and switching judging unit,

Described handover operation unit is used for initiating and/or carrying out handover operation;

Described switching judging unit comprises reason mark memory module and judge module,

Described reason mark memory module is used for storing the switch reasons sign of corresponding current switch reasons when the initiation of described handover operation unit is switched;

Described judge module, be used for carrying out follow-up handover operation process and judge that described switch reasons identifies pairing switch reasons and whether still exists in described handover operation unit, continue to carry out follow-up handover operation if then control described handover operation unit, then control described handover operation unit if not and begin the cancellation switching.

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