CN100438700C - A method to process failing reconfiguration of wireless bearing service - Google Patents

Abstract

The disclosed process method when reconfiguring wireless loading business comprises: once detecting the failure before the reconfiguration coming into effect, the wireless network controller sends RB reconfiguration information and receives UE failure information before appointed time in submit information to send wireless route reconfiguration cancellation information to Note B if building or reconfiguring wireless load failure; UE cancels directly new wireless route and initiates subzone updating. This invention simplifies recovery operation greatly, reduces possibility that UE detects desynchronized RL, and ensures receiving RL failure information.

Description

A method for processing radio bearer service reconfiguration failure

technical field

The present invention relates to an RB (Radio Bearer, radio bearer) establishment technology, in particular to a processing method when RB service reconfiguration fails.

Background technique

When the RNC (Radio Network Controller, radio network controller) performs RB establishment or RB reconfiguration on the UE (User Equipment, user equipment), instead of handover, the reconfiguration failure of the radio bearer service includes two situations, one is that the new configuration takes effect In the past, the RB failed to be established, and the other is that the RL lost synchronization after the new configuration took effect.

In the prior art, the processing flow of RB establishment failure before the new configuration takes effect is shown in Figure 1, including the following steps:

Step 1, RNC sends RL (Radio Link, wireless link) reconfiguration preparation message to NodeB, configures Node B's new code channel and time slot;

Step 2, Node B redistributes radio link resources to the physical layer and the frame protocol layer according to the received message, and returns an RL reconfiguration preparation response message to the RNC, notifying the RNC that the radio link reconfiguration preparation is complete;

Step 3, Node B and RNC interactively establish the connection of AAL2 (ATM Adaptation Layer type 2, ATM adaptation layer type 2), and carry out uplink/downlink synchronous establishment;

Step 4, RNC sends the RL reconfiguration submission message to Node B. In this step, although the RL submission message is sent to Node B, the activation time point indicated in the RL submission message has not yet arrived, so the physical layer of Node B Continue to use the code channel originally occupied by the UE;

Step 5, the RNC sends the RB establishment message to the UE signaling layer;

Step 6: After the UE receives the RB establishment message from the network side, RRC (Radio Resource Control, Radio Resource Control) checks the legitimacy of the RB establishment message (checked content includes code channel information, power information, transmission channel information, RB information, etc. ), if an illegal configuration is detected, the UE will directly return a radio bearer establishment failure message to the RNC through the current wireless link. If the RL reconfiguration message is invalid, the RL reconfiguration failure message will be returned. At this time, the old configuration information of the physical layer remains, but although the old configuration has not been deleted at the physical layer of Node B, the RL reconfiguration submission message in step 4 It has already been sent to Node B, so the old configuration can no longer be restored through the RL cancel message. To restore the old configuration at this time, the network side can only delete the new configuration through the RL delete message, and then restore the old configuration through the RL establishment. At this time, on the base station side The deletion and reconstruction of the RL should be completed as soon as possible. Otherwise, after the UE side returns to the old configuration, the base station side will not be able to rebuild the original configuration, and the UE will detect that the RL is out of sync. At this time, the UE will delete the RL and initiate a cell update. At that time, the work of rebuilding the old configuration of the base station will also fail.

In the prior art, the RL out-of-sync processing flow after the new configuration takes effect is shown in Figure 2. When the RB establishment message indicates that the UE enters the CELL-DCH state, and the current state of the UE is also the CELL-DCH state, the UE deletes the old configuration and establishes a new one. configuration, after the new configuration takes effect, the RRC of the UE starts the timer T312 and waits for the synchronization of the UE physical layer. If the RRC of the UE does not wait for the synchronization message before T312 times out, the old configuration will be restored. If the old configuration is successfully restored, the RRC will The original channel returns a network-focused configuration failure message. If the old configuration fails to be restored, that is to say, it still cannot be synchronized after restoring the configuration, and the old and new configurations cannot be synchronized with the base station. At this time, the UE can only delete the RL, and then perform a full-band cell search , and a suitable cell is found to initiate a cell update.

In the prior art, there are the following problems in the process of UE performing RB establishment or RB reconfiguration:

In step 5, if the UE detects that the reconfiguration (non-handover) of the service is an illegal configuration, it returns an RB establishment failure message to the network side on the original code channel. At this time, although the Node B has not deleted the original code channel of the physical layer, the RB Although the establishment failure message can be sent to RNC, but to restore the old configuration of NodeB, RNC can only delete the new configuration through the RL delete message, and then restore the old configuration through the RL establishment message, which is too complicated;

At the same time, if the UE detects that the reconfiguration of the service is a legal configuration, the UE and the physical layer on the network side will simultaneously activate on the new code channel at the specified time point. At this time, the code channel and time slot originally occupied by the UE have been deleted in the NodeB. At this time If the UE cannot synchronize on the new channel, the UE cannot succeed in returning to the previous configuration at this time, so returning to the old configuration at this time is an unnecessary operation.

Contents of the invention

The purpose of the present invention is to provide a processing method for radio bearer service reconfiguration failure. In the case of RB establishment failure before the new configuration takes effect, the old configuration can be restored through the RL cancel message, so as to reduce the probability of RL out-of-synchronization and quickly restore the old configuration. At the same time, when the RL is out of synchronization after the new configuration takes effect, the reconstruction of the UE and the network side is accelerated.

In order to achieve the above object, the present invention provides a processing method when radio bearer service reconfiguration fails. The user equipment performs detection after receiving the radio bearer establishment message. Before the new configuration takes effect, if the user equipment detects If the radio bearer establishment fails, the user equipment returns a radio bearer establishment failure message to the radio network controller through the current radio link, and the radio network controller sends a radio link reconfiguration cancel message to the Node B, otherwise The radio network controller sends a radio link reconfiguration commit message to the Node B as late as possible.

In the above-mentioned processing method when reconfiguration of the radio bearer service fails, when a radio link out of synchronization is detected on the new configuration of the radio link, the user equipment directly deletes the new radio link and then initiates a cell update.

The above processing method when the reconfiguration of the radio bearer service fails, wherein the radio network controller sends the radio link reconfiguration submission at a predetermined time before the effective time point specified in the radio link reconfiguration submission message reaches information.

The above-mentioned processing method when the radio bearer service reconfiguration fails, wherein, when it is detected that the radio bearer establishment fails before the new configuration takes effect, the following steps are specifically performed:

Step 31, the radio network controller sends a radio link reconfiguration preparation message to the Node B;

Step 32, the Node B reallocates radio link resources to the physical layer and the frame protocol layer according to the radio link reconfiguration preparation message, and returns a radio link reconfiguration preparation response message to the radio network controller;

Step 33, the radio network controller sends a radio bearer establishment message to the user equipment signaling layer;

Step 34, the user equipment signaling layer detects at the radio resource control protocol layer that the radio bearer establishment message is an illegal configuration or the user equipment physical layer returns a radio link reconfiguration failure message, and returns directly through the current radio link The radio bearer establishment failure message, otherwise, the radio network controller sends the radio link reconfiguration submission message at a predetermined time before the effective time point specified in the radio link reconfiguration submission message arrives;

Step 35, the radio network controller sends the radio link reconfiguration cancel message to the Node B after receiving the radio bearer establishment failure message, and restores the user equipment's status inside the radio network controller wireless link.

The above-mentioned processing method when the reconfiguration of the wireless bearer service fails, wherein when the wireless link out-of-synchronization is detected on the new configuration of the wireless link, the following steps are specifically performed:

Step 41, the radio network controller sends a radio link reconfiguration preparation message to the Node B;

Step 42, the Node B reallocates radio link resources to the physical layer and the frame protocol layer according to the radio link reconfiguration preparation message, and returns a radio link reconfiguration preparation response message to the radio network controller;

Step 43, the radio network controller sends a radio bearer establishment message to the user equipment signaling layer;

Step 44, Node B interacts with the radio network controller to establish an AAL2 connection, and establishes uplink/downlink synchronization. At the same time, the radio network controller specifies the effective time point in the radio link reconfiguration submission message sending the radio link reconfiguration commit message before the predetermined time is reached;

Step 45: After the user equipment signaling layer detects that the radio bearer setup message is legally configured at the radio resource control protocol layer and the user equipment physical layer returns a radio link reconfiguration success message, it starts a timer and waits for the synchronization of the physical layer;

Step 46, the timer expires, and the new configuration of the radio link detects that the radio link is out of synchronization, and the user equipment directly deletes the newly established radio link and initiates a cell update.

The above-mentioned processing method when the reconfiguration of the radio bearer service fails, wherein the predetermined time includes signaling transmission time and the delay waiting time of the corresponding transmission time interval of the signaling dedicated control channel, and the signaling transmission time includes an air interface round-trip time , the radio frequency physical layer and the wireless link control/media access control layer transparently transmit the message, the round-trip time of the IuB interface, and the time when the high-level processing of the user equipment fails.

In the above processing method when reconfiguration of the radio bearer service fails, the predetermined time is 1 to 16 frames.

The method for processing when the wireless bearer service reconfiguration fails in the present invention provides corresponding processing measures according to different time points of the failure, so that the process can be handled reasonably. In the method of the present invention, when the wireless link When the radio bearer establishment failure is detected before the configuration takes effect, the network side sends the RL reconfiguration commit message at a specific time before the physical layer activation time point specified by the network side, which ensures that the RB establishment failure message is sent before the RL reconfiguration commit message Reach the RNC before sending, so that the RNC sends the RL cancel message to the Node B after receiving the RB establishment failure message on the original channel, and at the same time restores the old configuration of the UE inside the RNC, which greatly simplifies the operation of restoring the old configuration. At the same time, it reduces the possibility that the UE detects that the RL is out of synchronization during this period, and achieves the purpose of quickly recovering the old resources; and when the wireless link is detected to be out of synchronization on the new configuration of the wireless link, the UE directly deletes the RL. And search for a suitable cell to camp on, and initiate the cell update of RL failure on the camped cell, which not only ensures that the network side can receive the RL failure message from the UE side in time, but also simplifies the processing on the UE side.

Description of drawings

Fig. 1 is the processing flow chart of RB establishment failure before the new configuration of RL takes effect in the prior art;

Fig. 2 is the processing flowchart of RL out-of-sync after the new configuration of RL takes effect in the prior art;

Fig. 3 is the processing flow chart that detects RB establishment failure on the RL old configuration of the present invention;

Fig. 4 is the processing flowchart of RL out-of-sync after the new configuration of RL of the present invention takes effect;

FIG. 5 is a schematic diagram of different state transitions of the UE in two situations in the present invention;

FIG. 6 is a schematic diagram of the processing flow of the terminal and the network side at different time points when the RB establishment fails in the present invention.

Detailed ways

The invention provides a processing method when the reconfiguration of the wireless bearer service fails, and provides corresponding processing measures according to different time points of the failure, so that the process can be processed reasonably.

In the embodiments of the present invention, both the new and old states are CELL_DCH for detailed description.

When the old and new states are both CELL_DCH, the radio bearer service reconfiguration fails in two cases:

Before the new configuration takes effect, the user equipment detects that the radio bearer establishment fails and detects that the RL is out of synchronization based on the new configuration of the RL.

Before the new configuration of RL takes effect, the situations where RRC detects the RB establishment failure message include:

If the reconfiguration message is detected as an illegal configuration at the RRC protocol layer or the UE physical layer returns an RL reconfiguration failure message, since this part of the detection is only a legality judgment, the UE can detect it immediately, and then return the RB establishment failure message to the network side. The present invention In the method, the network side sends the RL reconfiguration commit message to the NodeB at a specific time before the physical layer activation time point specified by the network side to ensure that the RB establishment failure message reaches the RNC before the RL reconfiguration commit message is sent, so that the RNC After receiving the RB establishment failure message on the original channel, the RL cancellation message is sent to the Node B, and the old configuration of the UE is also restored inside the RNC, which greatly simplifies the operation of restoring the old configuration.

Since the RNC sends the RL reconfiguration commit message at a predetermined time before the effective time point specified in the RL reconfiguration commit message reaches, in this way, the RB setup message can be sent first to give more time for sending the RL cancel message. At this time, the RNC did not send the RL reconfiguration submission message to the Node B. Since the new code channel has not taken effect and the original code channel has not been deleted, the original code channel resources can still be used. The RB establishment failure message is returned on the radio link, so after receiving the RB establishment failure message returned by the UE, the RNC sends the RL cancel message to the Node B to terminate the procedure, and the Node B can quickly restore the old configuration, which greatly reduces the UE's The possibility of RL out-of-synchronization is detected for a period of time, and the purpose of quickly restoring old resources is achieved.

In the present invention, the predetermined time includes the transmission time of signaling and the delay waiting time corresponding to TTI (Transmission Time Interval, transmission time interval) of DCH (Dedicated Control Channel, dedicated control channel) of signaling, and the transmission time of signaling includes: air interface Round-trip time, radio frequency physical layer and RLC (Radio Link Control, radio link control)/MAC (Media Access Control, media access control) layer transparent transmission time for messages, IuB port round-trip time, UE high-level processing failure time, These four periods of time are very short; the waiting time of TTI is the failure message of RRC organization. When sending to the RLC layer, if there is an RLC control frame, it may be delayed until the next TTI. The TTI at this time is generally 40ms . Considering the delay in these two aspects, the advance amount is set to 1-16 frames in the best embodiment of the present invention. If it is a normal process, the time point when UE specifies physical layer activation and RL submits specified CFN (Connection Frame Number, connection frame number) should be the same time point, and the network side and terminal should take effect at the same time point.

If RL out-of-synchronization is detected on the new configuration, the physical layer activates the new configuration after the activation time point is reached, and the physical layer returns a RL reconfiguration success response message. After receiving this message, RRC starts the synchronization timer T312, if When the synchronization timer T312 expires, RRC judges that the old and new states are both the CELL_DCH state, and RRC directly initiates a cell update for RL failure, and does not return to the old configuration. On the one hand, considering that this is service reconfiguration, it is impossible to return to the original configuration without changing the cell; on the other hand, considering the complexity of synchronous RL reconfiguration processing on the network side: because the network side has sent the RL reconfiguration submission message to Node B, after the physical layer takes effect at the activation time point, the new configuration is established, and the old configuration is deleted. At this time, Node B considers the processing to be successful, and there is no process of reporting synchronously.

At this time, the UE cannot synchronize on the new channel, and it must not be able to synchronize when returning to the old configuration. Therefore, in the present invention, the UE does not return to the old configuration, and directly deletes the RL, and then searches for a suitable cell to reside in. The cell update of RL failure is initiated on the Internet, so that on the one hand, the network side can receive the RL failure message from the UE side in time, and it also simplifies the processing on the UE side.

In the method of the present invention, when the RL detects that the RB establishment fails before the new configuration takes effect, the processing flow is as shown in Figure 3, including the following steps:

Step 31, RNC sends RL reconfiguration preparation message to Node B, configures Node B's new code channel and time slot;

Step 32, Node B redistributes the radio link resource to the physical layer and the frame protocol layer according to the received RL reconfiguration preparation message, and returns the RL reconfiguration preparation response message to the RNC, notifying the RNC that the radio link reconfiguration preparation is completed;

Step 33, the RNC sends an RB establishment message to the UE signaling layer;

Step 34, the UE signaling layer detects the RB setup message, checks the legitimacy of the RB setup message (checked content includes code channel information, power information, transmission channel information, RB information, etc.), if the RB is detected at the RRC protocol layer If the establishment message is an illegal configuration or the UE physical layer returns an RL reconfiguration failure message, it will directly return a radio bearer establishment failure message to the RNC on the old RL configuration;

Step 35: After receiving the radio bearer establishment failure message on the original channel, the RNC sends an RL cancellation message to the Node B, and at the same time, the RNC internally restores the UE's old RL configuration and ends the process.

Among them, the RNC sends the RL reconfiguration submission message 1 to 16 frames before the effective time point specified in the RL reconfiguration submission message reaches. The reserved time of 1 to 16 frames can ensure that the RNC has enough time to receive the RB setup time. Send RL cancel message to Node B after failure message;

In the method of the present invention, when the new configuration of the RL detects that the RL is out of sync, the processing flow is as shown in Figure 4, including the following steps:

Step 41, RNC sends RL reconfiguration preparation message to Node B, configures Node B's new code channel and time slot;

Step 42, the Node B redistributes the radio link resources to the physical layer and the frame protocol layer according to the received RL reconfiguration preparation message, and returns the RL reconfiguration preparation response message to the RNC, notifying the RNC that the radio link reconfiguration preparation is complete;

Step 43, the RNC sends an RB establishment message to the UE signaling layer;

Step 44: Node B interacts with RNC to establish an AAL2 connection, and establishes uplink/downlink synchronization. At the same time, RNC sends an RL reconfiguration submission message 1 to 16 frames before the effective time point specified in the RL reconfiguration submission message reaches , the reserved time of 1 to 16 frames can ensure that the RNC has enough time to send the RL cancel message to the Node B after receiving the reconfiguration failure message;

Step 45, the UE signaling layer detects the RB establishment message, checks the legitimacy of the RB establishment message (the inspection content includes code channel information, power information, transmission channel information, RB information, etc.), and does not detect the RB establishment at the RRC protocol layer After the message is an illegal configuration and the UE physical layer returns the RL reconfiguration success message, the RRC starts the timer T312 and waits for the synchronization of the physical layer;

Step 46, before the T312 timeout, the RRC at the signaling layer of the UE does not wait for the synchronization message, the RRC directly deletes the RL configuration, searches for a suitable cell to camp on, and initiates a cell update on the cell where the RL fails.

When the UE cannot obtain synchronization with the base station on the newly established code channel, it directly deletes the newly established RL, and then initiates a cell update. After the RNC receives the update of the RL out-of-sync cell, the RNC can rebuild the out-of-sync RL through CELLUPDATE CONFIRM (cell update confirmation message). Since there is no need to restore the old configuration at this time, the reconstruction of the UE and the network side is accelerated.

Since the service adjustment does not change the cell, if out-of-synchronization is detected, it is useless to restore the previous configuration, so the RL is released directly and the cell update is initiated. Figure 5 reflects that the UE failed to detect in the old configuration and in the new configuration. Different state transitions on which a failure was detected. For example, in the CELL_DCH state, the UE receives a physical channel reconfiguration message from the network side. After judging that the message is valid, it sends an RL reconfiguration message to the physical layer, and then waits for a response from the physical layer. If the physical layer returns a failure, the UE sends a reconfiguration message to the RNC. Configuration failure message. If the physical layer returns a reconfiguration success message, the UE sets the synchronization timer T312 to wait for synchronization. If the synchronization timer expires, the UE directly deletes the current RL, starts cell search, and enters the CELL_FACH state when a suitable cell is found. Then initiate a cell update.

Figure 6 reflects the processing flow of the terminal and the network side at different time points when the RB establishment fails in the present invention, it can be seen that the RL reconfiguration preparation message (RLReconfigPrepare) is processed first, and the RB establishment message (radioBearerSetup) is processed secondly, and the RL reconfiguration The commit message (RLReconfigCommit) is sent at the scheduled time before its specified effective time point. If there is a RB establishment failure message, it will reach the RNC before the RL reconfiguration commit message is sent. In this way, if the UE returns RB establishment failure on the old configuration message (RadioBearerSetupFailure), the RNC can send the RL cancel message (RLReconfigCancel) to the Node B, and if the UE does not detect a failure in the old configuration, it can perform subsequent processing; the physical layers of the base station and the UE activate the new RL at the activation time point at the same time. configuration, try to synchronize, if the UE fails to synchronize (the synchronization instruction of the physical layer is not received before T312), the UE directly deletes the new RL and initiates a cell update.

Certainly, the present invention also can have other multiple 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 processing method when radio bearer service reconfiguration fails, characterized in that, before the new configuration takes effect, if the user equipment detects that the radio bearer establishment fails, the user equipment passes the current radio link Return a radio bearer establishment failure message to the radio network controller, and send a radio link reconfiguration cancellation message to the Node B by the radio network controller, otherwise the radio network controller specifies in the radio link reconfiguration submission message A wireless link reconfiguration submission message is sent to the Node B at a predetermined time before the effective time point reaches. 2. The processing method when the radio bearer service reconfiguration fails according to claim 1, characterized in that the following steps are specifically performed: Step 31, the radio network controller sends a radio link reconfiguration preparation message to the NodeB; Step 32, the Node B reallocates radio link resources to the physical layer and the frame protocol layer according to the radio link reconfiguration preparation message, and returns a radio link reconfiguration preparation response message to the radio network controller; Step 33, the radio network controller sends a radio bearer establishment message to the user equipment signaling layer; Step 34, the user equipment signaling layer detects at the radio resource control protocol layer that the radio bearer establishment message is an illegal configuration or the user equipment physical layer returns a radio link reconfiguration failure message, and returns directly through the current radio link The radio bearer establishment failure message, otherwise, the radio network controller sends the radio link reconfiguration submission message at a predetermined time before the effective time point specified in the radio link reconfiguration submission message arrives; Step 35, the radio network controller sends the radio link reconfiguration cancel message to the Node B after receiving the radio bearer establishment failure message, and restores the user equipment's status inside the radio network controller wireless link. 3. The processing method when the radio bearer service reconfiguration fails according to claim 1 or 2, characterized in that, when the user equipment cannot obtain synchronization with the base station on the activated code channel, the user equipment directly deletes the new radio link Then initiate a cell update. 4. The method for processing when reconfiguration of the radio bearer service fails according to claim 3, wherein the user equipment cannot obtain synchronization with the base station on the activated code channel, and the user equipment directly deletes the new radio link To initiate a cell update, perform the following steps: Step 41, the radio network controller sends a radio link reconfiguration preparation message to the Node B; Step 42, the Node B reallocates radio link resources to the physical layer and the frame protocol layer according to the radio link reconfiguration preparation message, and returns a radio link reconfiguration preparation response message to the radio network controller; Step 43, the radio network controller sends a radio bearer establishment message to the user equipment signaling layer; Step 44, Node B interacts with the radio network controller to establish an AAL2 connection, and establishes uplink/downlink synchronization. At the same time, the radio network controller specifies the effective time point in the radio link reconfiguration submission message sending the radio link reconfiguration commit message before the predetermined time is reached; Step 45: After the signaling layer of the user equipment detects that the radio bearer setup message is legally configured at the radio resource control protocol layer and the physical layer of the user equipment returns a radio link reconfiguration success message, it activates the newly configured radio link at a specified activation time point The physical channel starts the synchronization timer at the same time, waiting for the synchronization of the physical layer; Step 46, the timer expires, the new configuration of the radio link cannot be synchronized with the base station, and the user equipment directly deletes the newly established radio link and initiates a cell update. 5. The processing method when the radio bearer service reconfiguration fails according to claim 4, further comprising the following steps: Step 47, the wireless network controller reestablishes the out-of-synchronization wireless link through CELL UPDATE CONFIRM. 6. The processing method when the reconfiguration of the radio bearer service fails according to claim 1 or 2, wherein the predetermined time includes the transmission time of the signaling and the delay waiting time of the corresponding transmission time interval of the signaling dedicated control channel . 7. The processing method when reconfiguration of the radio bearer service fails according to claim 6, wherein the signaling transmission time includes the round-trip time of the air interface, radio frequency physical layer and radio link control/media access control Layer-to-message transparent transmission time, IuB interface round-trip time, and user equipment high-layer processing failure time. 8 . The method for processing radio bearer service reconfiguration failure according to claim 6 , wherein the predetermined time is 1 to 16 frames.

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