TWI475902B - Method of controlling minimization of drive tests - Google Patents

Description

Control method for minimizing drive test

The invention relates to a method for controlling the minimization of the drive test, in particular to a method for the base station to control the user terminal to turn off the record-based minimization drive test in the idle mode.

The 3rd Generation Partnership Project (3GPP) has developed a universal mobile telecommunications system (UMTS) that uses wideband code division multiple access (WCDMA). The wireless access method is characterized by providing high spectrum utilization efficiency, high coverage, high quality and high rate of multimedia data transmission. A universal terrestrial radio access network (UTRAN) in a universal mobile telecommunications system can be regarded as a radio access network, which includes a plurality of base stations (Node-B, NB) for use with a plurality of base stations (Node-B, NB) User equipment (UE) communicates. In addition, in order to improve the general mobile telecommunications system, 3GPP further develops a long term evolution (LTE) system to meet the increasing demands of users. The Long Term Evolution (LTE) system is considered to provide a new wireless interface and wireless network architecture that provides high data transfer rates, low latency, packet optimization, and improved system capacity and coverage, including a number of evolved base stations (evolved Nodes). -B, eNB) is an evolved universal terrestrial radio access network (E-UTRAN), which is used to communicate with the UE on the one hand, and to handle non-processing on the other hand. The core network (CN) controlled by the non-access stratum (NAS) communicates, and the core network includes a servo gateway and a mobility management entity (MME). Device.

In order to enable the UE to receive services without being affected by severe disconnection or severe signal degradation, the wireless communication system (such as the Universal Mobile Telecommunications System or the Long Term Evolution System) needs to properly deploy the base station to provide The client has no gaps and good quality coverage. Therefore, the operator of the wireless communication system must spend considerable manpower and material resources to perform the quality measurement of the base station's signal products. Before the base station is deployed, the measurement results can be optimized and planned. There are many ways to perform measurements, such as measuring the strength and/or quality of signals at different times and locations. A more economical approach is to perform measurements by the user in the wireless communication system and to return the measurement results to the base station to provide the measurement results required by the operator. In other words, when a large number of clients perform measurement and return measurement results to the base station, the operator can use these measurement results to optimize and plan the base station deployment, thereby reducing the measurement requirements. Human and material resources. Therefore, the minimization of drive test (MDT) is defined in the 3GPP specifications, including both immediate minimization (LMT) and record-based minimization (logged MDT).

The client performs an instant minimization of the drive test in the connected mode, such as reference signal received power (RSRP), reference signal received quality (RSRQ), power margin ( Power headroom (PH), upload signal strength (upllink signal strength), or signal to interference and noise ratio (SINR), etc., and transmit the measurement result to the base station when the return condition is met.

For the record-based minimization drive test, the UE receives the Logged Measurement Configuration message transmitted by the base station in the connected mode, which includes the minimum measurement length, measurement interval or measurement parameter. MDT configuration. When the user enters the idle mode, the record-based configuration information can be used to perform the record-based minimization of the drive test and store the measurement results. When the amount of data exceeding the measurement time length or the measurement result exceeds a predetermined value, the user terminal stops performing the record-based minimization drive test, and transmits the measurement result to the base station after switching to the link mode.

In the prior art, when the UE performs the record-based minimization of the drive test in the idle mode, if the network requires the user to interrupt the ongoing record-based minimization of the drive test for a specific reason, the user needs to first switch to In the link mode, the network side then releases the instruction to stop the record-based minimization of the drive test. In other words, the network cannot directly control the operation of the client in the idle mode. The client needs to frequently switch between the link mode and the idle mode, thereby increasing power consumption and wasting network resources.

The present invention provides a method for controlling minimization of drive test, comprising: a UE performing one or more record-based minimization drive tests in an idle mode; and when receiving a message from a base station to close the message, The UE directly interrupts one or more ongoing specified record-based minimization drive tests in the idle mode according to the shutdown message.

For a user terminal and a base station in a wireless communication system, the present invention provides a method for controlling record-based minimization of road test in an idle mode, and the user terminal can directly transmit the message according to the base station without switching the operation mode. Turn off record-based minimization of drive tests. In the present invention, the wireless communication system can be a general mobile telecommunication system or a long term evolution system, which is composed of a network end and a plurality of user terminals. In a general mobile telecommunications system, the network side can be a universal terrestrial global wireless access network, which can include a plurality of base stations. In a long term evolution system, the network may be an evolved universal terrestrial global radio access network, which may include a plurality of evolved base stations. The client can be a device such as a mobile phone, a notebook computer, a tablet computer, an e-book, and a portable computer system. However, the above is only an embodiment of the present invention and does not limit the scope of the present invention.

1 is a flow chart of a method for turning off a record-based minimization drive test in an idle mode according to a first embodiment of the present invention, which includes the following steps:

Step 110: The UE performs one or more record-based minimization of the drive test in the idle mode and stores the measured data.

Step 120: The UE receives the close message transmitted by the base station in the idle mode.

Step 130: The UE stops performing one or more specified record-based minimization drive tests according to the close message in the idle mode.

Step 170: The UE returns the measurement data to the base station in the connection mode.

2 is a flow chart of a method for turning off a record-based minimization drive test in an idle mode according to a second embodiment of the present invention, which includes the following steps:

Step 110: The UE performs one or more record-based minimization of the drive test in the idle mode and stores the measured data.

Step 120: The UE receives the close message transmitted by the base station in the idle mode.

Step 140: The UE stops performing all record-based minimization drive tests in the idle mode.

Step 150: The user immediately establishes a radio resource control (RRC) connection with the base station.

Step 170: The UE returns the measurement data to the base station in the connection mode.

3 is a flow chart of a method for turning off the record-based minimization drive test in the idle mode in the third embodiment of the present invention, which includes the following steps:

Step 110: The UE performs one or more record-based minimization of the drive test in the idle mode and stores the measured data.

Step 120: The UE receives the close message transmitted by the base station in the idle mode.

Step 130: The UE stops performing one or more specified record-based minimization drive tests according to the close message in the idle mode.

Step 160: The user discards the measurement data related to one or more specified record-based minimization drive tests.

Step 170: The UE returns the measurement data to the base station in the connection mode.

When the client is in the connected mode the previous time, the base station can transmit a recorded measurement configuration message containing information related to the specific minimized drive test configuration. In step 110, the client can operate in accordance with a particular minimized drive test configuration, such as performing one or more record-based minimization drive tests.

In step 120, if the network end requires the user to stop performing one or more ongoing records for a specific reason (for example, enough users have been collected, network optimization has been completed, or power consumption of the user is saved). Minimize the drive test, at this time the base station will send a close message to the client.

According to the 3GPP specifications, when the UE is in the idle mode, the base station can transmit a paging message to the UE through a paging control channel (PCCH). The call message contains information such as the CN domain indicator, client identification, call range, and call reason. In the embodiment of the present invention, the close message may be an over-the-air (OTA) call message, and the reason for the call may be “interrupted record-based minimization drive test”. The reason for the "interrupted record-based minimization of drive test" may include interrupting one or more specified record-based minimization of drive test messages.

According to the 3GPP specifications, when the UE is in the connected mode, the base station can transmit a recorded measurement configuration message, which includes a minimization of the drive test configuration such as the measurement time length, the measurement interval or the measurement parameter. In the embodiment of the present invention, the close message may be an OTA record type configuration configuration message, wherein the specific parameter of the record type configuration information is set to be related to interrupting one or more specified record type minimization drive tests.

In the first embodiment of the present invention, after receiving the close message sent by the base station, the UE performs step 130 to stop performing one or more ongoing record-based minimizations according to the close message in the idle mode. Road test. After the base station completes other record-based minimization drive tests and switches to the connected mode, the UE will report the measurement data to the base station in step 170. In this embodiment, the measurement data of the client-side return base station includes information obtained from one or more specified record-based minimization drive tests before receiving the close message.

In the second embodiment of the present invention, after receiving the close message sent by the base station, the UE performs step 140 to stop performing all the ongoing record-based minimization drive tests according to the close message in the idle mode, and then Immediately in step 150, a radio resource control connection is established with the base station to enter the connected mode, and in step 170 the measurement data is reported back to the base station. In this embodiment, the measurement data of the client-side return base station includes information obtained from one or more specified record-based minimization drive tests before receiving the close message.

In the third embodiment of the present invention, after receiving the close message sent by the base station, the UE performs step 130 to stop performing one or more ongoing record-based minimizations according to the close message in the idle mode. The road test discards the measurement data related to one or more specified record-based minimization drive tests in step 160, and returns the measurement data to the base station in step 170. In this embodiment, the measurement data of the client-side return base station does not include information obtained from one or more specified record-based minimization drive tests before receiving the close message.

In the present invention, when the UE receives the close message transmitted from the base station in the idle mode, it stops performing one or more of the specified record-based minimization drive tests according to the close message, or stops performing all the executions. Recorded in the minimization of drive test. For the information obtained by minimizing the drive test from one or more specified records before receiving the close message, the UE may return the measurement data to the base station or directly discard it after entering the link mode. Since the UE does not need to switch between the connected mode and the idle mode, and directly interrupts one or more of the specified recording-based minimization driving tests according to the closing message in the idle mode, the present invention can reduce power consumption and Avoid wasting network resources.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

110~170‧‧‧Steps

1 to 3 are flowcharts showing a method of turning off the recording type minimization drive test in the idle mode in the embodiment of the present invention.

110~170. . . step

Claims (6)

A method for controlling a minimization of drive test (MDT), comprising: receiving, by a user terminal, a recording method related to a minimized drive test configuration from a base station in a connected mode LoggedMeasurementConfiguration message; the client switches from the connected mode to an idle mode, and performs one or more recordings according to the recorded configuration configuration message in the idle mode. Minimizing the drive test (logged MDT); the base station transmits a close message to the client to request the client to interrupt one or more specified record-based minimization drive tests; and after receiving the close message Before switching from the idle mode back to the connected mode, the UE interrupts the one or more specified record-based minimization drive tests directly in the idle mode according to the close message. The method of claim 1, further comprising: the user switching to the connected mode to report the measurement data related to the one or more record-based minimization drive tests to the base station. The method of claim 2, wherein: The user terminal interrupts all ongoing record-based minimization drive tests according to the shutdown message in the idle mode, and immediately establishes a radio resource control (RRC) connection with the base station to enter The link mode. The method of claim 2, further comprising: discarding the correlation in the measurement data before reporting the measurement data related to the one or more record-based minimization drive tests to the base station Minimize the information of the drive test in the one or more specified records. The method of claim 1, wherein the closing message is that the base station transmits a paging message through a paging control channel (PCCH), and one of the call messages is related to the call reason. Minimize the drive test by interrupting the one or more specified records. The method of claim 1, wherein: the closing message is that the client receives an over-the-air (OTA) recording type configuration information in the idle mode, and the closing is performed. The message contains a setting that interrupts the one or more specified record-based minimization drive tests.