CN100411451C - A method for configuring wireless link parameters - Google Patents

Abstract

The present invention discloses a method for configuring wireless link parameters, the method comprising: each time a service is accessed, on a dedicated channel established during the service access process, a radio network controller (RNC) sends a message to a base station (NodeB) Initiate a node synchronization process, the RNC obtains the current access service type Iub interface transmission delay between the RNC and the NodeB through the node synchronization process, and records the Iub interface transmission delay corresponding to the service type; RNC according to the recorded corresponding service Type Iub interface transmission delay configuration corresponds to the wireless link parameters of the service. According to the method disclosed by the invention, the Iub interface transmission time delay is acquired and updated during the service access process, so the wireless link parameter configuration is adaptive to different transmission networks and different transmission time delays of the Iub interface.

Description

A method for configuring wireless link parameters

technical field

The present invention relates to wireless resource management technology, in particular to a method for configuring wireless link parameters.

Background technique

The Universal Mobile Telecommunications System (UMTS) is a third-generation mobile communication system that uses Wideband Code Division Multiple Access (WCDMA) air interface technology. The UMTS system adopts a structure similar to that of the second-generation mobile communication system, including radio access networks ) and core network (CN). The UMTS Terrestrial Radio Access Network (UTRAN) includes one or several Radio Network Subsystems (RNS), and one RNS consists of a Radio Network Controller (RNC) and one or more Base Stations (NodeB). Wherein, the interface between RNC and NodeB is an Iub interface, and the transmission networking of the Iub interface can be Internet Protocol (IP) transmission, Asynchronous Transfer Mode (ATM) transmission, microwave transmission, satellite transmission, and ATM/IP hybrid transmission, etc.

Figure 1 shows the position of the RNC in the UMTS network. The RNC is used to control the radio resources of UTRAN. It mainly completes functions such as connection establishment and disconnection, handover, macro-diversity combination, and radio resource management control. The RNC needs to configure the network side and user The radio link parameters on the equipment (UE) side include the parameters of radio link control (RLC), media access control (MAC) and frame protocol (FP) layers. Since the RLC and MAC layers are terminated at the RNC, the Iub Different transmission technologies of the interface will affect the selection of wireless link parameters. In particular, when the transmission delays of different transmission technologies of the Iub interface are quite different, the selection of wireless link parameters cannot ignore the influence of the transport layer.

In the prior art, the empirical value of the transmission delay is determined according to the transmission technology used by the Iub interface, and then the wireless link parameters are configured according to these empirical values. For example, according to experience, the ATM transmission delay is less than 10ms, and the satellite transmission delay is 300ms. When connecting to the Internet, configure the wireless link parameters according to the transmission delay of 300ms.

The method of configuring wireless link parameters based on the empirical value of Iub interface transmission delay cannot adapt to complex transmission environments. For example, the transmission delay of the IP transmission network is very different at different times. Therefore, the empirical value of the transmission delay cannot be obtained, or the empirical value is very different from the actual Iub interface transmission delay, resulting in wireless link The configuration of parameters cannot select the optimal parameters according to the actual transmission delay.

With the development of transmission technology and the different needs of various services, different services will use different transmission networks for services, and in the prior art, the same Iub interface transmission delay is used to configure wireless link parameters for various services, and various services The wireless link parameters cannot be selected according to the actual Iub interface transmission delay of its own business.

To sum up, the method for configuring wireless link parameters described in the prior art cannot adapt to the actual transmission delay of the Iub interface and different transmission networks.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for configuring wireless link parameters, which can adapt to the actual transmission delay of the Iub interface and configure wireless link parameters for different transmission networks.

In order to achieve the above object, the present invention provides a method for configuring wireless link parameters, characterized in that the method includes:

a) During each service access, on the dedicated channel established during the service access process, the radio network controller RNC initiates a node synchronization process to the base station NodeB, and the RNC obtains and records the information between the RNC and the NodeB through the node synchronization process. The Iub interface transmission delay of the current access service type, and record the Iub interface transmission delay corresponding to the service type;

b) The RNC configures the radio link parameters of the corresponding service according to the recorded Iub interface transmission delay of the corresponding service type.

Further include before the step a:

After the common channel of the cell to which the NodeB belongs is established, the RNC initiates a node synchronization process to the NodeB, obtains the Iub interface transmission delay between the RNC and the NodeB through the synchronization process, and records the acquired Iub interface transmission delay as the time delay of all service types Iub interface transmission delay.

Before the step a, it further includes: RNC records the experience value of the Iub interface transmission delay as the Iub interface transmission delay of all service types.

The step of the described record of step a corresponding to the Iub interface transmission time delay of described business type comprises:

RNC judges whether the absolute value of the difference between the Iub interface transmission time delay of the current access service type obtained and the Iub interface transmission time delay of the recorded service type is greater than the threshold value, if so, then update the record obtained The transmission delay of the Iub interface of the service type; otherwise, keep the original record.

The step of the described record of step a corresponding to the Iub interface transmission time delay of described business type comprises:

RNC judges whether the Iub interface transmission time delay of the current access service type obtained and the Iub interface transmission time delay of the recorded service type are in the same time delay value range, if yes, then keep the original record; otherwise, The acquired transmission delay of the Iub interface of the service type is updated and recorded.

Wherein, after the above-mentioned service access process and the common channel of the cell to which the NodeB belongs are set up, the step of obtaining the transmission time delay of the Iub interface between the RNC and the NodeB through the node synchronization process includes:

a1) The RNC sends a downlink node synchronization message to the NodeB, and carries the time when the RNC sends the message in the message;

a2) After the NodeB receives the downlink node synchronization message, it returns an uplink node synchronization response to the RNC, and the response carries the time when the RNC sends the message, the time when the NodeB receives the message, and the time when the NodeB sends a response;

a3) After the RNC receives the synchronous response from the uplink node, it obtains the time when the RNC receives the response message, and obtains from the response message the time when the RNC sends the message, the time when the NodeB receives the message, and the time when the NodeB sends a response. According to the obtained time, Calculate the transmission delay of the Iub interface.

The transmission delay of the Iub interface calculated according to the obtained moment in step a3 is: the time difference between the moment when the RNC receives the response and the moment when the RNC sends the message minus the moment when the NodeB sends the response and the moment when the NodeB receives the message The round-trip transmission delay obtained by the time difference, or the one-way transmission delay obtained by calculating half of the round-trip transmission delay.

The transmission networking of the Iub interface is: asynchronous transfer mode ATM transmission, Internet Protocol IP transmission, microwave transmission, satellite transmission, or ATM/IP hybrid transmission.

According to the method provided by the present invention, in the service access process, the transmission delay of the Iub interface is obtained through the node synchronization process, and the latest Iub interface transmission delay is recorded, and then the wireless link is configured according to the recorded Iub interface transmission delay parameter. Since the NodeB processing delay is removed from the Iub interface transmission delay obtained through the node synchronization process, the acquired Iub interface transmission delay is the actual transmission delay. Therefore, the wireless link parameters are adaptive to the actual Iub interface transmission delay. The present invention also acquires the Iub interface transmission time delay respectively for various services, when configuring the wireless link parameter of a certain service, according to the Iub interface transmission time delay configuration parameter of the corresponding service, therefore, when mixed transmission, that is, different services use When different transmission networks are used, the wireless link parameters can also adapt to the actual transmission delay of the Iub interface of various services. The method for obtaining the transmission time delay of the Iub interface provided by the present invention is applicable to various transmission networks of the Iub interface, therefore, the configuration of the wireless link parameters is also adaptive to different transmission networks of the Iub interface.

Description of drawings

Figure 1 shows the position of the RNC in the UMTS network in the prior art;

Fig. 2 shows that in the embodiment of the present invention, RNC obtains the schematic diagram of Iub interface transmission time delay by node synchronization process;

Fig. 3 shows that in the embodiment of the present invention, obtains the flow chart of Iub interface transmission time delay by node synchronization process;

Fig. 4 shows the flowchart of configuring wireless link parameters in the embodiment of the present invention;

Fig. 5 shows the flowchart of updating the Iub interface transmission delay in the embodiment of the present invention;

FIG. 6 is a flow chart of updating the transmission delay of the Iub interface in the embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, specific examples are given below to further describe the present invention in detail.

The present invention configures the main idea of wireless link parameter as follows: RNC initiates node synchronization process in the transmission channel established at present, acquires and records Iub interface transmission time delay through node synchronization process, then configures according to the transmission time delay of recorded Iub interface Wireless link parameters.

Fig. 2 is the schematic diagram that RNC initiates node synchronization process and obtains Iub interface transmission time delay in the transmission channel currently set up, and its flow process as shown in Fig. 3, comprises the following steps:

Step 301: The RNC sends a downlink node synchronization message (DL NODESYNCHRONISATION) to the NodeB at time T1, and the message carries the time T1 when the RNC sends the message.

Step 302: NodeB receives the downlink node synchronization message sent by RNC at T2, and after NodeB performs relevant processing, it returns an uplink node synchronization response (ULNODE SYNCHRONISATION) to RNC at T3, and carries the ULNODE SYNCHRONISATION from the downlink node synchronization message in the response. The time T1 when the RNC sends the message, the time T2 when the NodeB receives the message, and the time T3 when the NodeB sends a response are obtained.

Step 303: RNC receives the uplink node synchronous response that NodeB returns at T4 moment, and obtains T1, T2, T3 from described response, RNC utilizes T1, T2, T3 and T4 to calculate the transmission delay of Iub transmission. RNC can calculate the round-trip transmission delay (Round Trip Delay) of the Iub interface according to specific needs, or can also calculate the one-way transmission delay of the Iub interface. The round-trip transmission delay of the Iub interface is: from the RNC receiving node synchronously responding to the sending node The time difference of the synchronization message minus the NodeB processing delay is (T4-T1)-(T3-T2); the one-way transmission delay of the Iub interface is half of the round-trip transmission delay.

In order to obtain the Iub interface transmission delay, the RNC initiates a node synchronization process in the currently established transmission channel, which can be a public channel or a dedicated channel (DCH). When the NodeB newly establishes a cell, the RNC initiates the node synchronization process in the public channel and obtains the transmission delay of the Iub interface; during the service access process, the RNC initiates the node synchronization process in the dedicated channel and obtains the transmission time of the Iub interface delay.

Through the above steps, the Iub interface transmission delay obtained by the RNC is the actual Iub interface transmission delay after the NodeB processing delay is removed.

The present invention provides the wireless link parameter configuration method of adaptive Iub interface actual transmission time delay, as shown in Figure 4, this method comprises the following steps:

Step 401: After the common channel of the cell to which the NodeB belongs is established, the RNC initiates a node synchronization process on the common channel, obtains the transmission delay of the Iub interface through the node synchronization process, and records the transmission delay of the Iub interface.

The transmission delay of the Iub interface obtained in this step is used as an initial reference for configuring wireless link parameters. In actual service transmission, different services can be served by different transmission networks, and different services have different priorities and service quality (QoS) requirements, and different service transmission delays are also different.

However, in the initial stage, since no specific business is involved, a unified initial value can be given for all business types, for example: record the transmission delay of the Iub interface obtained on the public channel in this step as the Iub interface of all business types The initial value of the transmission delay. Alternatively, the empirical value of the Iub interface transmission delay is recorded as the initial value of the Iub interface transmission delay. Of course, if the types of transmission networks used by various services are known, the initial values of the Iub interface transmission delays of various service types can be obtained respectively according to the empirical values of the Iub interface transmission delays in each transmission network.

Wherein, the various types of services include multiple services, such as voice services, conversation services, stream services, background services, and the like. Different transmission networks that can be used by various services include but are not limited to: ATM transmission, IP transmission, microwave transmission, satellite transmission, and ATM/IP hybrid transmission network.

Step 402: During the service access process, the RNC configures the radio link parameters of the corresponding service according to the recorded transmission delay of the Iub interface of the service, and establishes a dedicated channel according to the radio link parameters.

Step 403: RNC initiates a node synchronization process on the dedicated channel established in the service access process, obtains the transmission time delay of the Iub interface of the service through the node synchronization process, and updates the original recorded transmission of the Iub interface for the service Delay, re-record the transmission delay of the Iub interface of the service acquired this time, and return to step 402.

RNC all carries out described step 403 in all kinds of business access processes, promptly obtains the transmission time delay of the Iub interface of corresponding business through the node synchronization process of the dedicated channel of various business, and updates the Iub interface transmission time delay of corresponding business Record. In the process of accessing various services, configuring the wireless link parameters according to the recorded transmission delay of the Iub interface can ensure that the wireless link parameters are always based on the latest Iub interface transmission delay. The road parameters are adaptive to different transmission networks and different transmission delays of the Iub interface.

As described in step 403, in each service access process, the Iub interface transmission time delay is updated, and a method for updating the Iub interface transmission time delay is provided below, as shown in Figure 5, including the following steps:

Step 501: During the service access process, the RNC initiates a node synchronization process on the dedicated channel established during the service access process, and obtains the transmission delay of the Iub interface of the service through the node synchronization process.

Step 502: judge whether the absolute value of the difference between the Iub interface transmission time delay of the business acquired in step 501 and the recorded Iub interface transmission time delay of this business is greater than the threshold value, if yes, then perform step 503; otherwise , go to step 504.

The threshold value needs to be preset with an appropriate value. For example, an appropriate value can be set based on the influence of the Iub interface transmission delay on the wireless link parameters.

Step 503: Update the Iub interface transmission delay of the service, that is, record the Iub interface transmission delay obtained in step 501, and end this process.

Step 504: Keep the originally recorded Iub interface transmission delay of the service, and end this process.

In the process of updating the transmission delay of the Iub interface above, if the impact of the transmission delay of the Iub interface on the configured wireless link parameters within the range of t milliseconds can be ignored, the threshold value can be set to t/2 milliseconds, and then the obtained Whether the absolute value of the difference between the Iub interface transmission delay and the recorded transmission delay is greater than t/2 milliseconds, if yes, update the Iub interface transmission delay; otherwise, keep the original record.

When different wireless link parameters are configured according to different value ranges of the Iub interface transmission time delay, another method for updating the Iub interface transmission time delay is provided for the process of updating the Iub interface transmission time delay described in step 403, as shown in the figure 6, including the following steps:

Step 601: During the service access process, the RNC initiates a node synchronization process on the dedicated channel established during the service access process, and obtains the transmission delay of the Iub interface of the service through the node synchronization process.

Step 602: judge whether the Iub interface transmission time delay of the business acquired in step 601 and the recorded Iub interface transmission time delay of this business are within the value range of the same Iub interface transmission time delay, if yes, then perform the steps 603; otherwise, go to step 604.

The value range of the Iub interface transmission delay needs to be preset with an appropriate range. For example, the appropriate range can be set based on the impact of the Iub interface transmission delay on the wireless link parameters.

Step 603: Keep the original recorded Iub interface transmission delay of the service, and end this process.

Step 604: Update the Iub interface transmission delay of the service, that is, record the Iub interface transmission delay acquired in step 601, and end this process.

Figure 6 above shows the process of updating the transmission delay of the Iub interface, and the processing result of this process is illustrated below with an example. Assume that one wireless link parameter is configured in the Iub interface transmission delay greater than or equal to t1 milliseconds to less than t2 milliseconds, and another wireless link parameter is configured in the range of greater than or equal to t2 milliseconds to less than t3 milliseconds, if the currently obtained Iub interface transmission delay Within the range of t2 to t3, and the recorded Iub interface transmission delay is within the range of t1 to t2, the RNC updates the Iub interface transmission delay of the service; if the currently obtained Iub interface transmission delay is the same as the obtained Iub interface If the transmission delays are all within the range of t1 to t2, the original records are kept.

After the Iub interface transmission delay is updated through the above steps, the radio link parameters can be configured using the updated Iub interface transmission delay during the service access process.

To sum up, the transmission delay of the Iub interface is updated in real time according to the change of the transmission network, and the configuration of the wireless link parameters is to select the optimal parameter according to the transmission delay of the Iub interface obtained above. Therefore, the wireless link parameter adaptive Changes in the Iub interface transmission network and transmission delay.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (8)

1. the method for a configurating radio link parameter is characterized in that, this method comprises:

A) during each service access, on the dedicated channel of in the service access process, being set up, radio network controller (RNC) is initiated the node synchronizing process to base station node B, RNC obtains the Iub interface propagation delay time of current access service types between RNC and the NodeB by described node synchronizing process, and writes down the Iub interface propagation delay time of corresponding described type of service;

B) RNC disposes corresponding professional radio link parameter according to the Iub interface propagation delay time of the corresponding type of service that is write down.

2. method according to claim 1 is characterized in that, further comprises before the described step a:

After the common signal channel of NodeB affiliated subdistrict is set up, RNC initiates the node synchronizing process to NodeB, obtain Iub interface propagation delay time between RNC and the NodeB by this synchronizing process, the Iub interface propagation delay time of being obtained is recorded as the Iub interface propagation delay time of all types of service.

3. method according to claim 1 is characterized in that,

Further comprise before the described step a: RNC is recorded as the empirical value of Iub interface propagation delay time the Iub interface propagation delay time of all types of service.

4. according to claim 2 or 3 described methods, it is characterized in that the step of the Iub interface propagation delay time of the corresponding described type of service of the described record of step a comprises:

Whether the absolute value of the difference of the Iub interface propagation delay time of the Iub interface propagation delay time of the current access service types that the RNC judgement is obtained and the described type of service that has write down is greater than threshold value, if, the propagation delay time of the Iub interface of the described type of service that more new record obtained then; Otherwise, keep original record.

5. according to claim 2 or 3 described methods, it is characterized in that the step of the Iub interface propagation delay time of the corresponding described type of service of the described record of step a comprises:

Whether the Iub interface propagation delay time that RNC judges the current access service types obtained and the Iub interface propagation delay time of the described type of service that has write down be in same time delay span, if then keep original record; Otherwise, the propagation delay time of the Iub interface of the described type of service that new record obtained more.

6. method according to claim 1 and 2 is characterized in that, the step of obtaining the described Iub interface propagation delay time between RNC and the NodeB by the node synchronizing process comprises:

A1) RNC sends the descendant node synchronization message to NodeB, and carries in this message the moment that RNC sends message;

A2) after NodeB receives the descendant node synchronization message, return the upstream node sync response, and in this response, carry the moment of RNC transmission message, the moment of NodeB reception message and the moment that NodeB sends response to RNC;

A3) after RNC receives the upstream node sync response, obtain RNC and receive moment of this response message, and from response message, obtain the moment of RNC transmission message, the moment of NodeB reception message and the moment that NodeB sends response, according to the resulting moment, calculate the propagation delay time of Iub interface.

7. method according to claim 6, it is characterized in that, the propagation delay time of the described Iub interface that calculates according to the resulting moment of step a3 is: RNC receives time difference between the moment of response and moment that RNC sends message and deducts NodeB and send resulting round trip transmission delay of time difference between the moment of response and moment that NodeB receives message, perhaps calculates half unidirectional transmission time delay that obtains of described round trip transmission delay.

8. method according to claim 1 is characterized in that, the transmission group net of described Iub interface is: asynchronous transfer mode ATM transmission, Internet protocol IP transmission, microwave transmission, satellite transmits, or ATM/IP mixed transport.

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