CN102404779B - A kind of method for early warning of communication quality change and system - Google Patents

Abstract

The invention discloses a method and system for early warning of communication quality changes. The method includes a radio network controller RNC detecting the communication quality of a wireless communication device when performing communication services, and according to the detection result, when the communication quality deteriorates, the core network CN Sending an early warning event message to a wireless communication device, through the technical solution provided by the present invention, can send an early warning event message to a user of the wireless communication device in advance before the communication quality of the wireless communication device changes.

Description

An early warning method and system for communication quality changes

technical field

The invention relates to the field of wireless communication, in particular to an early warning method and system for communication quality changes.

Background technique

Wireless signal propagation has some areas where wireless network signals cannot be covered or areas where wireless signals are weak. In order to allow users to enter these areas and maintain communication quality unchanged, some people have proposed a method to extend the coverage distance of mobile services, that is, in these differences Repeaters are added at the edge, or a wireless fixed access station is added between the base station and the mobile stations in these areas. These devices are equivalent to a wireless signal repeater, which serves as a method to extend the coverage area of mobile services. But these devices are only able to narrow areas where the signal cannot reach or where the signal is weak, not completely eliminate them. Someone proposed another method, which is to switch the wireless communication device on hold from the 3G network to the 2G network or other network systems, and switch before the user drops the call. The defect of this method is that the signal blind area must be covered by other wireless network systems , other wireless network systems must also support the handover, even if the handover from the 3G system to the 2G system can be realized, but the 3G network provides users with a variety of services, such as video calls and various high-speed data services. UE (wireless communication equipment) switches from 3G to 2G network. When UE initiates a video call on the 3G network, it becomes a voice call. Without knowing it, the service changes suddenly, which deviates from user expectations.

Contents of the invention

The invention provides an early warning method and system for communication quality changes, which can send early warning event messages to users of the wireless communication equipment before the communication quality of the wireless communication equipment changes.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A method for early warning of communication quality changes, comprising:

The radio network controller RNC detects the communication quality of the wireless communication device when performing communication services, and according to the detection result, sends an early warning event message to the wireless communication device via the core network CN when the communication quality deteriorates.

The RNC encapsulates the early warning event message by extending the RANAP (RadioAccessNetworkApplicationPart, control plane protocol between RNC and CN) signaling for uplink information exchange, and then encapsulates the uplink event message with the early warning event message The RANAP signaling for information exchange is sent to the CN.

It also includes comparing whether the information exchange ID and the CN domain indication of the early warning event message and the response message of the early warning event message fed back by the CN to the RNC through the response signaling of the uplink information exchange are consistent, and if they are consistent, It means that the sending of the early warning event message is successful, and if they are inconsistent, it means that the sending of the early warning event message fails.

The RNC encapsulates the early warning event message into newly added RANAP signaling and sends it to the CN.

It also includes judging whether the wireless communication device has an early warning function, and providing early warning event messages to the wireless communication device on the premise that the early warning function is enabled.

If the communication service of the wireless communication device is voice communication, the steps of detecting the communication quality of the wireless communication device when performing the communication service include:

Compare the current measured value of the block error rate BLER of uplink data with the preset BLER threshold value;

If the current measurement value of the BLER is greater than the BLER threshold value, then comparing the current measurement value of the received signal code power RSCP of the public channel where the wireless communication device is located with a preset RSCP threshold value;

If the current RSCP measurement value is smaller than the RSCP threshold value, an early warning event message is sent to the wireless communication device.

If the communication service of the wireless communication device is video communication, the steps of detecting the communication quality of the wireless communication device when performing the communication service include:

The radio network controller RNC sends a measurement control message to the wireless communication device to start the inter-system communication quality measurement event;

When the network signal quality deteriorates, the wireless communication device reports a measurement report to the RNC;

After receiving the measurement report, the RNC sends an early warning event message to the wireless communication device.

The early warning event message includes an AT event message.

The data content of the AT event is generated in the custom prompt server CATServer.

An early warning system for communication quality changes, including a radio network controller RNC, the RNC includes an early warning function module, the early warning function module is used to detect the communication quality of wireless communication equipment when performing communication services, and according to the detection results, in the communication When the quality deteriorates, an early warning event message is sent to the wireless communication device via the core network CN.

The present invention adopts the above technical scheme, when the communication quality of the wireless communication device is about to change, the network side sends an early warning event message to the wireless communication device in advance, and the wireless communication device may stop moving after receiving the warning prompt, effectively avoiding the wireless communication device The communication quality changes, even if the communication quality changes, it is in the user's prediction, thereby enhancing the user experience.

The invention can not only reduce the probability of communication quality change, but also enhance user experience, and can effectively reduce technical cost compared with other methods in the prior art.

Description of drawings

FIG. 1 is a schematic diagram of a network element structure according to an embodiment of the present invention;

Fig. 2 is the frame diagram of the realization of early warning prompt of the embodiment of the present invention;

Fig. 3 is the flow chart of the implementation of early warning and prompting according to the embodiment of the present invention;

FIG. 4 is a flow chart of quality detection of voice communication according to an embodiment of the present invention;

FIG. 5 is a flow chart of quality inspection of video communication according to an embodiment of the present invention;

Fig. 6 is a flow chart of realizing early warning and prompting in another embodiment of the present invention.

detailed description

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

The early warning method for communication quality change mainly includes: detecting the communication quality of the wireless communication device when performing communication services; according to the detection result, sending an early warning event message to the wireless communication device when the communication quality deteriorates.

Please refer to FIG. 1, which is a schematic diagram of the network element structure of the embodiment of the present invention, UE (wireless communication equipment), RNC, CN, wherein CN includes MSC (MobileSwitchingCenter, mobile switching center), MGW (MediaGateWay, media gateway), HLR ( HomeLocationRegister, home location register), CATServer (CustomizedAlertingToneServer, customized reminder server), CATServer is the core component of the reminder in the CN circuit domain, and is used to store CAT business logic and play multimedia resources, such as storing voice, recording, video, Picture, text and other content; MSC completes call control and mobility control, and is responsible for CS call processing and other functions; MGW main function is to provide bearer control and transmission resources, bearer and media processing, and also has media processing equipment (such as code converter) , pick-up eliminator, conference bridge, etc.), perform media conversion and frame protocol conversion; HLR is a common component of CS domain and packet switching (PS, PacketSwitch) domain, responsible for managing user databases, storing subscription data and mobile data of users under its jurisdiction. The user's location information can provide routing information; RNC is the control device of the access network of the 3G network, responsible for access network signaling processing, transmission bearer and radio resource control and other functions.

Please refer to FIG. 2 , which is a frame diagram of an embodiment of the present invention for realizing an early warning prompt: the present invention can adopt different communication quality detection methods according to different types of communication services of wireless communication devices. For example, when the communication type is voice communication, conduct voice communication quality inspection, and judge whether an early warning event message is generated and send to the wireless communication device according to the detection result; if the communication type is video communication, perform video communication quality inspection, and judge according to the detection result Whether to generate and send an early warning event message to the wireless communication device. The early warning event includes various forms, such as AT (Alerting Tone, reminder), short message, multimedia message or other forms that can play a role in early warning.

Embodiment one:

Please refer to Figure 3, which is a flow chart of realizing the early warning prompt in the embodiment of the present invention, and further describes the embodiment of the present invention in detail:

S110. When the UE's CS service is established, that is, after the called UE is off-hook, the RNC starts the early warning function module, and generates an AT event message according to different communication services. For example, when the communication type is voice communication, the early warning function module performs voice communication. Quality inspection, and according to the detection result, judge whether to produce AT event message; The AT event message is passed to the RANAP module of the RNC.

S120. The RANAP module of the RNC receives the AT event message, encapsulates it into a RANAP message, and transmits the RANAP message to the MSC through the Iu interface. The RANAP message is an uplink information exchange (UplinkInformationExchange), which is suitable for the transmission of the AT event message. It does not need to add a RANAP message, and only needs to be extended in the uplink information exchange to transmit the AT event message. The information element of uplink information exchange includes information exchange ID (InformationExchangeID), information exchange type (InformationExchangeType), information transfer type (InformationTransferType), information request type (InformationRequestType), CN domain indication (CNDomainIndicator), global RNCID (GlobalRNC- ID). Extend the information exchange type field to an information AT type, the information request type represents the AT event type, encapsulate the AT event message in the RANAP signaling of the uplink information exchange, and transmit this signaling to the MSC through the Iu interface, cache The uplink information is exchanged, and at the same time, the timer Timer1 for sending the AT event message is started.

S130. The RANAP module of the MSC receives the uplink information exchange signaling, and parses the AT event message from the uplink information exchange signaling according to the method of encapsulating the AT event message in step S120. The MSC sends an AT command message to the CAT Server, and the AT command message is defined in the standard interface function between the MSC and the CAT server.

S140. After receiving the AT command message, the CAT Server sends the specified type of AT data to the MGW, and the AT data is transmitted to the UE through the MGW.

S150. The MSC replies a response to the AT event message to the RNC, so that the RNC can know whether the CN supports the AT event function. The response AT event message from the MSC to the RNC is encapsulated in the response message of the uplink information exchange. The response message includes a successful response message and a failed response message.

S151, the successful response of the AT event message that the MSC replies to the RNC, the RNC receives the uplink information exchange response (UplinkInformationExchangeResponse) signaling, indicating that the MSC sends the AT event message successfully, and ends the sending timer Timer1 of the AT event message in the S120 step . The information element of the uplink information exchange response encapsulated by the MSC contains the information exchange ID and the CN field indication. The values of the information exchange ID and the CN field indication are the same as the value of the received uplink information exchange, indicating that the correct AT is received. A successful response to an event message.

S152. The MSC replies a failure response of the AT event message to the RNC. The RNC receives an Uplink Information Exchange Failure (UplinkInformationExchangeFailure) signaling indicating that the MSC fails to send the AT event message, and ends the AT event message sending response timer Timer1. The MSC encapsulates the failure response message of the AT event message in the uplink information exchange failure, and the information element of the uplink information exchange failure includes information exchange ID, CN field indication, and failure reason.

The above S151 and S152 may be further, after the RNC receives the uplink information exchange response, whether it is an uplink information exchange response or an uplink information exchange failure, the RNC first parses the information exchange ID and The CN field indicates whether the two cells are consistent with the cached sending uplink information exchange, and if they are consistent, the AT event message sending timer Timer1 is ended and the cache is cleared. For the failed AT command response, depending on the cause of the failure, the AT command may be resent to the MSC at regular intervals, and steps S120-S150 may be repeated.

In this embodiment, the early warning function is enabled for all users, the Iu interface does not need to add new RANAP messages, the AT event from the RNC to the MSC is encapsulated in the message exchanged by the uplink information, and the response and uplink information are exchanged by using the uplink information The response message of the exchange failure is used as the response message of the AT event message from the MSC to the RNC. The AT event message is a confirmation mode message, which improves the transmission reliability of the AT event, and the RNC can further subdivide and process the response result.

When the communication type is voice communication, the implementation method of voice communication quality detection by the early warning function module is as follows, please refer to Fig. 4, which is a flow chart of quality detection of voice communication in the embodiment of the present invention:

S011. Obtain the BLER (BlockErrorRate) of the uplink data. The transmission channel of the RNC user plane will calculate the BLER value of the uplink channel. If the BLER value is large, it means that the bit error is large, and the UE may be at the edge of the signal or in an area with relatively large signal interference;

S012. Compare the BLER value with a preset BLER threshold value 1. If the BLER value is greater than the preset BLER threshold value 1, proceed to the next step S013, otherwise execute S011 and restart the detection;

S013. Obtain an RSCP (ReceiveSignalCodePower) value of a PCPICH (PrimaryCommonPilotChannel) of the UE. The UE will periodically send a measurement report to the RNC, including the RSCP value of the common channel PCPICH of the current serving cell. If the UE receives PCPICH with low power, it means that the UE is far away from the base station;

S014. Compare the RSCP value with the preset RSCP threshold value 2. If the RSCP value is less than the preset RSCP threshold value 2, proceed to the next step S015, otherwise go to S011 and restart the detection;

S015. Output the AT event message, send the AT event message to the RANAP module, and pass it to the CN.

When the communication type is video communication, the early warning function module further includes the following steps before performing video communication quality inspection. Please refer to FIG. 5, which is a flow chart of quality inspection of video communication according to an embodiment of the present invention:

S021. The UE initiates a video call service.

S022. Determine whether the CN allows system switching from 3G to 2G. When the ServiceHandover IE in the RAB (RadioAccessBearer) AssignmentRequest message sent by the CN to the RNC takes the value of HandovertoGSMshouldnotbeperformed, it means that the RAB has to switch to GSM when the UMTS cannot carry it. That is, switch to the 2G system only when the signal quality of the UMTS network is poor. If it is allowed, execute S023; otherwise, execute S025.

S023. Determine whether the CN allows the video call to fall back to the voice call. When the service is established, the CN indicates that the RNC can be used to perform the SCUIDF (ServiceChangeandUDI/RDIFallback) triggered by the network through the AlternativeRABConfiguration information element in the RABAssignmentRequest to allow the video fallback operation. After receiving the RABAssignmentRequest message, the RNC judges whether the AlternativeRABConfiguration cell carries voice call information, if there is AlternativeRABConfiguration cell information, execute S024, otherwise execute S025.

S024. Start the video communication quality detection function, and execute S026.

S025. Turn off the video communication quality detection function.

S026. After the call is established, the RNC sends a measurement control message of the 2E event to the UE. When the network signal quality deteriorates, the UE will report the measurement report of the 2E event to the RNC. After receiving the measurement report of the 2E event, the RNC executes S027.

S027. The early warning function module of the RNC outputs the AT event message of video call change, sends the AT event message to the RANAP module, and transmits the AT event message to the CN.

The above-mentioned 2E event is a form of starting an inter-system communication quality measurement event.

Embodiment two:

Please refer to FIG. 6 , which is a flowchart of another embodiment of the present invention for implementing early warning prompts.

The early warning service function for early warning of changes in the communication quality of wireless communication equipment depends on the needs of users. Not all users enable this function, and only users who have customized the early warning service function enable this service when they are talking. The user's AT customization information is stored in the CN's HLR. When the call is established, the user's customized AT service is delivered from the CN to the RNC. The RNC starts the early warning function module after receiving the AT startup command. The implementation steps of this embodiment are as follows:

S210, the user customizes the AT service function from the operator, and the UE information for which the AT service function is customized will be stored in the user database of the HLR.

S220. When the UE initiates a call and the MSC reads the UE information from the HLR, if the UE subscribes to the AT service, the MSC activates the AT function. After the UE call is established, the MSC sends a new RANAP signaling AT event control message (ATEventControlMessage) to the RNC. The information elements included in the RANAP signaling of the AT event control information include a message type and a control type.

S230. After the RANAP module of the RNC receives the RANAP signaling of the AT event control information, the RANAP module transmits the signaling to the early warning function module.

S240. If the communication type of the wireless communication device is voice communication, the early warning function module performs voice communication quality detection, and judges whether an AT event message is generated according to the detection result; if the communication type is video communication, the early warning function module performs video communication quality Detect, and judge whether to generate an AT event message according to the detection result. Finally, the early warning function module transmits the AT event message to the RANAP module of the RNC.

S250. After receiving the AT event message, the RANAP module on the RNC sends the AT event message to the MSC. The AT event message is encapsulated in a newly added RANAP signaling AT event message (ATEventMessage). The information element of the AT event message includes a message type and a report event type.

S260. After receiving the AT event message, the RANAP module of the MSC parses out the AT event message, and sends an AT command to the CAT server.

S270. After the CAT server receives the AT command from the MSC, the CAT sends AT data of a specified type to the MGW.

S280. The MGW sends the AT data to the UE.

With this embodiment, because the RANAP messages of ATEventControlMessage and ATEventMessage are newly added, there is no correlation between the messages, the message transmission is simple, belongs to non-confirmation messages, and the transmission efficiency is high. The business brings benefits and adds a value-added service content.

Embodiment three:

From Fig. 2, it is known that realizes the frame diagram of early warning prompt for the embodiment of the present invention, a kind of early warning system, comprises RNC, and this RNC comprises early warning function module, and this early warning function module is used for detecting the communication quality when wireless communication equipment carries out communication business, And according to the detection result, when the communication quality deteriorates, an early warning event message is sent to the wireless communication device via the core network CN.

Using the above embodiments, when the communication quality of the wireless communication device is about to change, the network side sends an early warning event message to the wireless communication device in advance, and the wireless communication device may stop moving after receiving the warning prompt, effectively avoiding the communication quality of the wireless communication device. Even if there is a change in the communication quality, it is in the case of the user's prediction, thereby enhancing the user experience, and compared with other methods in the prior art, the technical cost can be effectively reduced.

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

Claims (10)

1. a method for early warning for communication quality change, is characterized in that, comprising:

After calling communication set up by wireless telecommunications system, radio network controller (RNC) detects the communication quality that wireless telecommunications system carries out this calling communication, and according to testing result, send early warning event message through core net CN to described wireless telecommunications system when communication quality becomes bad.

2. method for early warning as claimed in claim 1, it is characterized in that, described RNC carries out expansion by the chain of command agreement RANAP signaling between RNC and CN that exchange up-link information and encapsulates described early warning event message, then the RANAP signaling that the up-link information being packaged with described early warning event message exchanges is sent to described CN.

3. method for early warning as claimed in claim 2, it is characterized in that, the information exchange ID and the CN territory that also comprise the response message of the described early warning event message that more described early warning event message is fed back to RNC by the response signaling that described up-link information exchanges with CN indicate whether consistent, if consistent, then represent that described early warning event message sends successfully, if inconsistent, then represent that described early warning event message sends unsuccessfully.

4. method for early warning as claimed in claim 1, it is characterized in that, described early warning event message is packaged into newly-increased RANAP signaling and sends to described CN by described RNC.

5. method for early warning as claimed in claim 1, is characterized in that, also comprise and judge whether wireless telecommunications system opens warning function, and open the prerequisite of warning function at wireless telecommunications system under, sends early warning event message to described wireless telecommunications system.

6. method for early warning as claimed in claim 1, is characterized in that, if the communication traffic of wireless telecommunications system is speech communication, the step detecting communication quality when wireless telecommunications system carries out communication traffic comprises:

Compare the block error rate BLER current measurement value of upstream data and the BLER threshold value preset;

If described BLER current measurement value is greater than described BLER threshold value, then compare the received signal code power RSCP current measurement value of wireless telecommunications system place common signal channel and the RSCP threshold value preset;

If RSCP current measurement value is less than described RSCP threshold value, then send early warning event message to wireless telecommunications system.

7. method for early warning as claimed in claim 1, is characterized in that, if the communication traffic of wireless telecommunications system is video communication, the step detecting communication quality when wireless telecommunications system carries out communication traffic comprises:

RNC issues the Survey control message of communication quality measurement event between open system to wireless telecommunications system;

When network signal quality is deteriorated, wireless telecommunications system is to RNC reporting measurement reports;

RNC receives described measurement report, sends early warning event message to wireless telecommunications system.

8. the method for early warning as described in as arbitrary in claim 1 to 7, it is characterized in that, described early warning event message comprises AT event message.

9. method for early warning as claimed in claim 8, it is characterized in that, the data content of described AT event message generates in self-defined signal language server CATServer.

10. the early warning system of a communication quality change, comprise radio network controller (RNC), it is characterized in that, described RNC comprises warning function module, described warning function module is used for after calling communication set up by wireless telecommunications system, detect the communication quality that wireless telecommunications system carries out this calling communication, and according to testing result, send early warning event message through core net CN to described wireless telecommunications system when communication quality becomes bad.