CN111800816B - A method for terminal to realize minimum drive test function - Google Patents

Abstract

The invention relates to a method for a terminal to realize the minimum drive test function, and belongs to the field of mobile communication. The method includes the following steps: Step 1: planning a normal idle mode task list, the terminal plans the normal idle mode tasks with the paging cycle as a time base, and generates a normal idle mode task list; Step 2: planning a minimum drive test MDT measurement task list, the terminal According to the minimum drive test MDT measurement requirements, the measurement requirements include measurement content and measurement reporting; step 3: generate a joint task scheduling list in idle mode; step 4: idle mode task execution; step 5: report the minimum drive test MDT measurement result. The invention has the advantages that the two planning tasks are jointly planned and the minimum drive test MDT task is decomposed into the minimum drive test MDT measurement small units, and then allocated to different paging periods for measurement processing.

Description

A method for terminal to realize minimum drive test function

technical field

The invention belongs to the field of mobile communication, and relates to a method for a terminal to realize a minimum drive test function.

Background technique

In a mobile communication network, due to the complex geographical environment and various occlusions of wireless propagation, it brings great challenges to the deployment of mobile networks. The drive test can reflect the actual situation of the mobile communication network, can directly evaluate the network service quality, and reflect that the network has specific coverage problems. Although the drive test is an important method for operators to optimize the network, the traditional drive test method requires the operator or a third-party company to test the area that needs to be monitored and optimized, and collect network data such as signal level and quality through the drive test instrument. By analyzing these data to find network problems, this method often requires a lot of human, material and financial investment, and also has very high experience requirements for network optimization personnel, and the test results cannot cover all practical scenarios.

Minimization of drive tests (MDT) is mainly through the measurement of the actual scene of the mobile terminal, and the measurement report is reported to the network to provide the relevant parameters required for network optimization, so as to reduce the operation and maintenance cost of the operator. The 3GPP R9 version studies the minimization of drive test technology as a research topic, clarifies the requirements for MDT technology in several application scenarios such as coverage optimization, and analyzes and evaluates its feasibility and implementation (see 3GPPTR 36.805). In 3GPP R10, the control plane-based solution has been standardized in the coverage optimization scenario (see 3GPP TS 37.320), and it has been officially written into the technical specifications in the R16 version of LTE and 5G.

Regardless of the minimum drive test MDT technology in 4G or 5G, the working principle and mechanism are the same. Figure 1 shows the basic process of MDT implementation. The minimum drive test MDT is mainly divided into three steps.

Step 1: Minimum drive test MDT measurement parameter configuration. After a radio resource control (RRC) signaling connection is established between the terminal and the network, the network configures the minimum drive test MDT measurement requirement to the terminal through connection mode signaling.

Step 2: Minimum drive test MDT measurement. After the terminal receives the minimum drive test MDT measurement parameters configured by the network, the network releases the RRC signaling connection, and the terminal enters the idle mode. The terminal will start the MDT measurement plan according to the MDT configuration parameters, and execute the MDT measurement according to the measurement plan. If the MDT measurement result meets the reporting conditions, the MDT measurement result is reported, otherwise the terminal continues to perform the MDT measurement process.

Step 3: The minimum drive test MDT is reported. If the terminal needs to report the MDT measurement result, the terminal initiates a random access procedure, establishes an RRC signaling connection between the terminal and the network, and then reports the MDT measurement result to the network through the RRC signaling connection to complete a complete MDT measurement process.

From a theoretical point of view, the minimum drive test MDT is one of the methods to perfectly solve the wireless coverage and network optimization of mobile networks, but it is often not ideal in practical engineering. There are two main reasons.

First: The minimum drive test MDT reports the location information and measurement information of the terminal, which leads to leakage of user privacy, so the terminal is unwilling to enable the function of supporting the minimum drive test MDT, and the actual implementation effect is not ideal. The main solution at present is to desensitize the drive test data.

Second: the problem of terminal power consumption. The terminal only interprets paging in idle mode, and performs downlink synchronization and normal idle mode measurements when interpreting paging, so the power consumption is very low, usually only a few milliamps. However, after starting the minimum drive test MDT, the terminal not only needs to complete the interpretation and paging function in idle mode, but also needs to perform MDT measurement and start MDT measurement reporting, which greatly increases the power consumption of the terminal in idle mode. In actual engineering use, after the terminal enables the minimum drive test MDT, the standby time of the terminal is significantly shortened, which makes users unwilling to enable the minimum drive test function. Currently, there is no better solution.

The unsatisfactory power consumption of the minimum drive test MDT is mainly caused by the lack of strict power saving planning. In essence, the MDT measurement in idle mode is mainly RF reception, and does not need to be applied and the screen is turned on, so the minimum drive test MDT has little impact on power consumption. However, the measurement planning and scheduling of the minimum drive test MDT in idle mode does not meet the requirements of the power saving planning. The specific operation is shown in Figure 2. It has the following characteristics.

Feature 1: For a terminal in idle mode, when no paging arrives, the baseband of the terminal is in a deep sleep state. Only when the terminal paging opportunity arrives, will it wake up from deep sleep and perform paging interpretation. As shown in FIG. 2 , the terminal may enter the sleep mode during the period when no task is executed.

Feature 2: The terminal is configured with the minimum drive test MDT measurement requirements, and the MDT measurement task in idle mode is added. There are generally two implementations. In one way, after the terminal configures the MDT measurement, even if the terminal in the idle mode is always in the measurement state and performs the measurement process, the terminal cannot enter the sleep mode. In another way, after configuring the MDT measurement, the terminal first performs measurement planning, then periodically performs measurement, and finally reports the measurement results that meet the reporting conditions. As shown in FIG. 2 , after completing the paging, the terminal enters the sleep mode, then wakes up to perform MDT measurement, and enters the sleep mode again after completing the MDT measurement.

Feature 3: In idle mode, the terminal needs to support interpreting paging and performing minimum drive test MDT measurement. However, there is no correlation between paging timing, measurement planning, and measurement reporting. As a result, the terminal in idle mode cannot enter the sleep mode or the terminal keeps waking up from sleep to perform MDT measurement, resulting in increased power consumption. As shown in FIG. 2 , in the idle mode, between two monitoring pagings, the terminal needs to wake up from the sleep mode multiple times in order to perform MDT measurement.

In the terminal power-saving design, the terminal enters the sleep mode in idle mode, and every time it wakes up, the baseband system needs to be powered on again and a series of initialization operations are performed. electricity, will lead to increased power consumption.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a method for a terminal to realize the minimum drive test function.

For achieving the above object, the present invention provides the following technical solutions:

A method for a terminal to implement a minimum drive test function, the method comprising the following steps:

Step 1: Plan the normal idle mode task list, the terminal plans the normal idle mode tasks with the paging cycle as the time base, and generates the normal idle mode task list; the idle mode terminal without task execution will enter the sleep mode, and when the task execution time reaches the terminal Only wake up and switch from sleep mode to working mode; working mode terminal performs paging message interpretation, serving cell downlink synchronization and measurement tasks; measurement tasks include serving cell and neighbor cell measurement for cell selection and reselection;

Step 2: planning the minimum drive test MDT measurement task list, the terminal according to the minimum drive test MDT measurement requirements, the measurement requirements include measurement content (measurement tasks) and MDT measurement reporting conditions; the terminal plans the MDT measurement tasks, determines the measurement priority, and Measuring the time interval, evenly distributing the MDT measurement tasks in the time interval, and generating the minimum drive test MDT measurement task list;

Step 3: generate a joint task scheduling list in the idle mode; according to the time period when the terminal wakes up from the sleep mode is determined in step 1, the MDT measurement task time interval and measurement priority are determined in step 2; the minimum drive test MDT measurement task is mapped to the terminal The sleep mode wake-up time period generates the idle mode joint task scheduling list; after the terminal wakes up, it not only needs to process the normal idle mode task list, but also needs to process the minimum drive test MDT measurement task;

Step 4: Idle mode task execution; idle mode terminal, when there is no task scheduling period, will enter sleep mode, when the paging opportunity arrives, wake up from sleep mode, and execute the task in the corresponding idle mode joint task scheduling list;

Step 5: The minimum drive test MDT measurement result is reported; each time the minimum drive test MDT measurement task is completed, check whether the MDT measurement conditions for reporting are met; if the conditions for reporting MDT measurement are met, the random access process is started, the RRC signaling connection is established, and then Report the MDT measurement results to complete the network MDT measurement requirements.

Optionally, the generating the idle mode joint task scheduling list is specifically:

The idle mode terminal first calculates and determines the monitoring paging time 1, paging time 2, ..., paging time N, where N is an integer greater than 1, to form the execution time sequence of the normal idle mode task list; then according to the minimum drive test MDT measurement task list, calculate MDT measurement tasks, assuming MDT measurement 1, MDT measurement 2, ..., MDT measurement K, K is an integer greater than 1, generate MDT measurement cell; finally, MDT measurement cell is mapped to At the most recent monitoring paging moment, the normal idle mode task and the MDT measurement cell are combined into a processing unit for the terminal to wake up from the sleep mode, and all the processing units are combined together to form the idle mode joint task scheduling list.

The beneficial effects of the present invention are:

Supports minimum drive test MDT terminals. Since the task planning and minimum drive test MDT measurement planning in normal idle mode are carried out independently, the terminal in idle mode needs to periodically wake up from sleep mode to perform normal idle mode tasks, and periodically wake up from deep sleep. Perform MDT measurement tasks. And the two periods are not correlated, so the frequency of the terminal being woken up from the sleep mode to perform the task is increased, resulting in an increase in the power consumption of the terminal in the idle mode.

The invention has the advantages that the two planning tasks are jointly planned and the minimum drive test MDT task is decomposed into the minimum drive test MDT measurement small units, and then allocated to different paging periods for measurement processing. That is, the terminal needs to complete the normal idle mode task at the same time when it wakes up from the idle mode, sleep power saving mode As a result, the number of times the terminal wakes up from the sleep mode is avoided, and the purpose of power saving is achieved.

Other advantages, objects, and features of the present invention will be set forth in the description that follows, and will be apparent to those skilled in the art based on a study of the following, to the extent that is taught in the practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the following description.

Description of drawings

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be preferably described in detail below with reference to the accompanying drawings, wherein:

Figure 1 shows the general flow of MDT measurement implementation;

Fig. 2 is the conventional method of MDT measurement planning;

Figure 3 is a block diagram of MDT measurement scheduling planning management;

Figure 4 is the MDT measurement implementation process;

FIG. 5 is a diagram of a method for planning a joint task scheduling list in an idle mode;

Fig. 6 is PDCCH paging monitoring occasion;

Fig. 7 is the minimum drive test MDT measurement task planning;

Fig. 8 is idle mode joint task scheduling plan;

FIG. 9 shows the joint task execution process in idle mode.

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

Among them, the accompanying drawings are only used for exemplary description, and represent only schematic diagrams, not physical drawings, and should not be construed as limitations of the present invention; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, The enlargement or reduction does not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms “upper”, “lower”, “left” and “right” , "front", "rear" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must be It has a specific orientation, is constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation of the present invention. situation to understand the specific meaning of the above terms.

The terminal supports the MDT (Minimization of drive tests) function, and the terminal in idle mode needs to perform the measurement process from time to time according to the MDT measurement requirements, which increases the power consumption of the terminal in idle mode. The basic idea of the present invention is that a terminal in idle mode plans a normal idle mode task list according to paging occasions, that is, planning to interpret paging messages, downlink synchronization of serving cells, and measurements of serving cells and neighboring cells. If the minimum drive test MDT measurement requirement is configured, the terminal divides the MDT measurement tasks and sorts them according to the priority of the measurement tasks to form a minimum drive test MDT measurement task list. Then use the terminal idle mode to interpret the paging message cycle as the measurement scheduling time base, and jointly plan the normal idle mode task and the minimum drive test MDT measurement task to avoid the idle mode terminal due to the minimum drive test MDT measurement and additional wake-up from sleep mode. number of times.

The invention consists of 6 modules, an idle mode paging DRX configuration module, a normal idle mode task planning module, an MDT measurement task requirement module, a minimum drive test MDT measurement task planning module, an idle mode joint task scheduling module, and an MDT measurement reporting module. As shown in Figure 3.

In the idle mode paging DRX configuration module, the terminal recommends the length of the paging cycle, the network finally determines to use the terminal recommended or default paging cycle length to send the paging message, and the terminal determines the paging cycle configuration according to the network and periodically interprets the paging message.

The normal idle mode task planning module, the idle mode terminal, when the paging opportunity arrives, the terminal wakes up from the sleep mode to execute and interpret the paging message. The terminal interprets the paging message and simultaneously completes the serving cell measurement, downlink synchronization and neighbor cell measurement, and supports terminal cell selection and reselection in idle mode. This module plans the normal idle mode task list.

MDT measurement task requirement module, the network notifies the terminal of the minimum drive test MDT measurement requirement through radio resource control (RRC) connection signaling, including specific minimum drive test MDT measurement content and MDT measurement reporting conditions.

The minimum drive test MDT measurement task planning module, the terminal configures the MDT measurement requirements according to the network, plans the measurement start time, measurement priority, and measurement sample period interval, ensures the periodic and even distribution of MDT measurement tasks, and generates the minimum drive test MDT measurement task list.

The idle mode joint task scheduling module, the terminal wakes up from the sleep mode according to the paging cycle, that is, the idle mode terminal. The MDT measurement task is adjusted to the nearest paging time, and the idle mode joint task scheduling list is generated. Whenever the paging opportunity arrives, the terminal performs the task of completing the normal idle mode, and continues to perform the MDT measurement task of the minimum drive test.

The MDT measurement reporting module configures the network to configure the minimum drive test MDT measurement requirements and measurement reporting conditions. After the MDT measurement is completed and the MDT measurement reporting conditions are met, random access is initiated and the minimum drive test MDT measurement result is reported.

The specific execution process of the present invention is shown in FIG. 4 .

Step 1: planning a normal idle mode task list, the terminal plans a normal idle mode task with a paging cycle as a time base, and generates a normal idle mode task list. The idle mode terminal without task execution will enter the sleep mode. When the task execution time expires, the terminal will be woken up and transformed from the sleep mode to the working mode. The working mode terminal performs paging message interpretation, serving cell downlink synchronization and measurement tasks. Measurement tasks include serving cell and neighbor cell measurements for cell selection and reselection. Step 1 as shown in Figure 4.

Step 2: Plan a minimum drive test MDT measurement task list, and the terminal according to the minimum drive test MDT measurement requirements, the measurement requirements include measurement content (measurement tasks) and MDT measurement reporting conditions. The terminal plans the MDT measurement tasks, determines the measurement priority, and the measurement time interval, distributes the MDT measurement tasks evenly in the time interval, and generates a minimum drive test MDT measurement task list. Step 2 as shown in Figure 4.

Step 3: Generate an idle mode joint task scheduling list. According to the time period during which the terminal wakes up from the sleep mode is determined in step 1, and the MDT measurement task time interval and measurement priority are determined in step 2. The minimum drive test MDT measurement task is mapped to the terminal sleep mode wake-up time period, and the idle mode joint task scheduling list is generated. After the terminal wakes up, it not only needs to process the normal idle mode task list, but also needs to process the minimum drive test MDT measurement task. Step 3 as shown in Figure 4.

Step 4: Idle mode task execution. The idle mode terminal will enter the sleep mode when there is no task scheduling. When the paging opportunity arrives, it will wake up from the sleep mode and execute the tasks in the corresponding idle mode joint task scheduling list. Step 4 as shown in Figure 4.

Step 5: The minimum drive test MDT measurement result is reported. Each time the minimum drive test MDT measurement task is completed, check whether the conditions for reporting the MDT measurement are met. If the conditions for reporting the MDT measurement are met, the random access procedure is started, the RRC signaling connection is established, and then the MDT measurement result is reported to complete the network MDT measurement requirement. Step 5 as shown in Figure 4.

To further describe the formation process of the idle mode joint task scheduling list, as shown in FIG. 5 . The idle mode terminal first calculates and determines the monitoring paging time 1, paging time 2, . . . , and paging time N (N is an integer greater than 1) to form the execution time sequence of the normal idle mode task list. Then, according to the minimum drive test MDT measurement task list, the MDT measurement task is calculated, assuming MDT measurement 1, MDT measurement 2, ..., MDT measurement K (K is an integer greater than 1), and the MDT measurement cell is generated. Finally, the MDT measurement cell is mapped to the nearest monitoring paging time, and the normal idle mode task and the MDT measurement cell are combined into a processing unit for the terminal to wake up from sleep mode. All processing units are combined to form an idle mode joint Task scheduling list.

Example

Minimization of drive tests (MDT) has many advantages. MDT measures the actual scene of the mobile terminal and reports it to the network through the measurement report, so as to provide the relevant parameters required for network optimization, so as to reduce the operation and maintenance cost of the operator. Therefore, in the 3GPPR9 version, the minimization drive test technology was studied as a research topic, the requirements for MDT technology in several application scenarios such as coverage optimization were clarified, and its feasibility and implementation methods were analyzed and evaluated, and the summary was written in the 3GPP technical report ( Abbreviation: TR) 36.805. In 3GPP R10, the control plane-based solution was standardized in the coverage optimization scenario, which was also written into the 3GPP Technical Specification (TS) 37.320, and was officially incorporated into the 5G R16 Technical Specification (TS Specification for short).

In order to more clearly illustrate the application of the present invention in an actual product, the present invention will use the minimum drive test MDT implementation method in a 5G terminal as an example to illustrate. The following describes the four processes.

The first process: 5G terminal normal idle mode task planning

In the process of terminal startup registration, the terminal sends a registration message (REGISTRATION REQUEST) to the Access and Mobility Management Function (AMF) equipment of the 5G core network (abbreviation: 5GC). The message includes the information requested by the terminal. Idle mode discontinuous parameters (Requested DRX parameters) member content. This member specifies the idle mode DRX parameters that the terminal expects to use.

After the network receives the REGISTRATION REQUEST message, it will reply with a registration acceptance message (REGISTRATIONACCEPT), indicating that the network accepts the registration request reported by the terminal. The terminal can enter the normal service state. In this message, the network will provide the negotiated DRX parameters (Negotiated DRX parameters).

Whether it is a member of Requested DRX parameters or Negotiated DRX parameters, its content format is 5GS DRX parameters (5GS DRX parameters).

The specific definition of 5GS DRX parameters (9.11.3.2A 5GS DRX parameters in 3GPP TS24.501) is as follows:

3GPP TS24.501 Figure 9.11.3.2A.1: 5GS DRX parameter information element

The value of the DRX value is such as the content of Table 9.11.3.2A.1:5GS DRX parameter information element in 3GPP TS24.501.

3GPP TS24. Table 9.11.3.2A.1: 5GS DRX parameter information member

As described above, the terminal can optionally provide the DRX cycle parameter T value in the REGISTRATION REQUEST message when registering. If the network accepts the parameter value or provides a specific T value, the network will provide it in the REGISTRATIONACCEPT message. If the network does not provide the DRX cycle parameter T value in the REGISSTRATION ACCEPT message, the default DRX cycle parameter T value of the cell will be used, which is broadcast in system message 1 (SystemInformationBlockType1), specifically configured through the paging control channel in SIB1 ( PCCH-Config) member informs the terminal. For details, please refer to the description of the 3GPPTS38.331 protocol.

SIB1->servingCellConfigCommon->downlinkConfigCommon->pcch_Config

Where PCCH-Config is defined as follows:

In this member, defaultPagingCycle indicates the default DRX cycle parameter T value.

The terminal obtains the DRX cycle parameter T value according to the above, and determines the timing for the terminal to receive paging according to the description of 7.1 Discontinuous Reception for paging in 3GPP TS38.304. The methods for calculating the parameters of the paging frame (abbreviation: Paging Frame, PF) and the paging occasion (abbreviation: paging occasion, PO) for the terminal to receive paging are as follows.

SFN method determined by PF: (SFN+PF_offset)mod T=(TdivN)*(UE_ID mod N)

PO indexing method, using Index(i_s) to indicate: i_s=floor(UE_ID/N)mod Ns

in:

T: Indicates DRX cycle parameters, from the defaultPagingCycle configuration;

N: Indicates the number of all paging frames (PF) included in the T time, from the nAndPagingFrameOffset parameter;

PF_offset: PF offset, from the nAndPagingFrameOffset parameter;

Ns: Indicates the number of paging occasions (PO) included in a paging frame, from the ns parameter;

UE_ID: 5G system terminal temporary identification (abbreviation: 5G-S-TMSI) mod 1024;

For a terminal, by calculating the PF, the system frame number of the terminal receiving the paging message can be known, and then by calculating i_s, it can be known that the terminal PO is the i_s+1th PO in the PF.

The PO here is not the physical downlink shared channel (referred to as: Physical Downlink Shared Channel, PDSCH) resource that specifically carries the paging control channel (referred to as: Paging Control Channel, PCCH), but the physical downlink control channel that carries the PCCH data block needs to be interpreted. (abbreviation: PhysicalDownlinkControlChannel, PDCCH) resource location also becomes a PDCCH monitoring occasion (PDCCH monitoring occasion) for monitoring paging. As shown in Figure 6.

When the terminal is in idle mode, when the PDCCH paging occasion arrives, it must wake up from sleep mode to perform PDCCH paging interpretation. If the terminal parses the PDCCH and indicates that there is a PDSCH data block for carrying paging messages, the terminal continues to parse the PDSCH. Otherwise go to sleep mode again.

In order to ensure that the idle mode terminal always maintains the downlink synchronization state, in the process of parsing the PDCCH and PDSCH, the serving cell measurement and downlink synchronization calibration process are completed at the same time, and cell selection and reselection related measurements are performed to meet the terminal's mobile needs.

The second process: 5G terminal minimum drive test MDT measurement task planning

The minimum drive test of the 5G system is officially entered in the REL16 version of 3GPP. After the terminal enters the connection mode, it is configured to the terminal through the loggedMeasurementConfiguration message in the downlink dedicated channel. The specific configuration content of LoggedMeasurementConfiguration is as follows:

In the content configuration of LoggedMeasurementConfiguration, there are mainly two contents.

Content 1: The measurement content of the network configuration minimum drive test MDT. The minimum drive test MDT measurement content in the 5G system is more, including measurement area, measurement time length, measurement list (mobile quality measurement, Bluetooth (BT) measurement, wireless local area network (WLAN) measurement) and so on.

Content 2: Network configuration minimum drive test MDT measurement reporting method. That is, the existence reporting methods are defined, one is periodic reporting, and the other is event reporting. Periodic reporting requires the terminal to periodically report the MDT measurement result, and event reporting defines the conditions that trigger the terminal to report the MDT measurement. As long as the condition is met, the MDT measurement result is reported immediately. The network can only choose one of the reporting methods.

When the terminal receives the minimum drive test MDT measurement request from the network, it firstly plans various measurements of the network to ensure that various measurement quantities can be executed.

For example, in this embodiment, a minimum drive test MDT measurement task plan is assumed, as shown in FIG. 7 . Network configuration wireless measurement, BT measurement and WLAN measurement. Among them, because there are many wireless measurement contents, the wireless measurement is divided into three time periods for measurement. One of the wireless measurements, BT measurement and WLAN measurement, forms a small unit of MDT measurement. Three MDT measurement cells form a complete MDT measurement cycle.

During the MDT measurement process of the terminal, as long as the terminal meets the minimum measurement MDT reporting requirements, it will report immediately.

The third process: 5G terminal idle mode joint task scheduling list

In the second process, a minimum drive test MDT measurement task planning list is generated. According to the network configuration minimum drive test MDT measurement requirements, and the PDCCH paging monitoring timing in the first process is not related and continuous, the terminal performs the normal idle mode task and performs the minimum drive test. MDT measurement tasks will be divided into different planning times. According to the method of the present invention, the planned minimum drive test MDT measurement task is allocated to the occasions of different normal idle mode tasks. The execution time of the normal idle mode task satisfies the PDCCH paging monitoring occasion. According to the requirements of the present invention, the smallest unit of minimum drive test MDT measurement is always planned to the nearest PDCCH paging monitoring timing point. As shown in Figure 8.

Fourth process: 5G terminal idle mode joint task execution

The terminal is in sleep mode before the PDCCH paging monitoring timing arrives. When the paging timing arrives, the terminal wakes up from sleep mode. First, the baseband power-on initialization is performed, and then the radio frequency parameter configuration is performed, and the radio frequency gain is automatically adjusted (referred to as: AGC). ), use the paging radio network identifier (P-RNTI for short) to interpret the PDCCH, if the PDCCH carries a downlink control message (DCI) for effective paging, continue to interpret the corresponding PDSCH data block according to the DCI value. If it is not determined in the PDCCH that the paging message exists or the terminal is not paging, the terminal will perform the wireless measurement of the minimum drive test MDT, the BT measurement and the WLAN measurement. As shown in Figure 9.

Specific steps are as follows.

Step 1: The terminal generates an idle mode joint task according to the minimum drive test MDT measurement in the connected mode and the paging parameter configuration. Then enter normal idle mode. When the terminal enters the normal idle mode, the baseband radio frequency will be turned off, and the radio frequency will be turned off to enter the sleep power saving mode. The terminal in the sleep mode can wake up from the sleep mode only when the PDCCH paging opportunity arrives or the application requests. Steps 1 and 2 in Figure 9.

Step 2: If the PDCCH paging occasion arrives, the terminal wakes up from the sleep mode. The terminal first powers up the baseband and radio frequency, and then interprets the PDCCH block according to the time-frequency resources of the PDCCH. Steps 3 and 4 in Figure 9.

Step 3: The terminal uses the P-RNTI to check whether the PDCCH data block indicates that there is a PDSCH data block carrying the paging PCCH. If it is checked that there is a paging PDSCH data block, paging message interpretation is performed first, otherwise idle mode related measurements are performed. Steps 5 and 6 in Figure 9.

Step 4: Use the local terminal identifier (IMSI or S-TMSI) to check the paging message carried by the PDSCH to check whether it is the local terminal paging. This process is completed in the radio resource control layer (abbreviation: RRC). If it is the paging of the terminal, the terminal starts the response paging process and initiates the random access process to enter the connected mode; otherwise, the related measurement in the idle mode is performed. Steps 7 and 8 in Figure 9.

Step 5: During the process of interpreting the PDCCH, the terminal also completes the downlink synchronization process of the serving cell, and also needs to complete the normal idle mode task, that is, in this step, the terminal first measures the serving cell, and then measures the neighboring cells to complete the measurement requirements of the terminal in the idle mode. , which supports the terminal to perform cell selection and reselection in normal idle mode. Step 9 in Figure 9.

Step 6: After completing the normal idle mode task, the terminal starts the minimum drive test MDT measurement task according to the idle mode joint task list. If the MDT measurement reporting conditions are met, the MDT measurement reporting is performed, otherwise the baseband power is turned off again, and the terminal enters the sleep mode. Step 10 as shown in Figure 9.

Step 7: Trigger to report the MDT measurement result, the terminal first initiates a random access procedure, establishes an RRC signaling connection, and the terminal reports the MDT measurement result to the network on the signaling connection. Steps 11, 12, and 13 in Figure 9.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should all be included in the scope of the claims of the present invention.

Claims (2)

1. A method for realizing a minimum drive test function by a terminal, characterized in that: the method comprises the following steps: Step 1: Plan the normal idle mode task list, the terminal plans the normal idle mode tasks with the paging cycle as the time base, and generates the normal idle mode task list; the idle mode terminal without task execution will enter the sleep mode, and when the task execution time reaches the terminal Only wake up and switch from sleep mode to working mode; working mode terminal performs paging message interpretation, serving cell downlink synchronization and measurement tasks; measurement tasks include serving cell and neighbor cell measurement for cell selection and reselection; Step 2: Plan the minimum drive test MDT measurement task list. The terminal determines the minimum drive test MDT measurement requirement, which includes the measurement content and MDT measurement reporting conditions; the terminal plans the MDT measurement task, determines the measurement priority, and the measurement time interval, The MDT measurement tasks are evenly distributed in the time interval, and the minimum drive test MDT measurement task list is generated; Step 3: generate a joint task scheduling list in the idle mode; according to the time period when the terminal wakes up from the sleep mode is determined in step 1, the MDT measurement task time interval and measurement priority are determined in step 2; the minimum drive test MDT measurement task is mapped to the terminal The sleep mode wake-up time period generates the idle mode joint task scheduling list; after the terminal wakes up, it not only needs to process the normal idle mode task list, but also needs to process the minimum drive test MDT measurement task; Step 4: Idle mode task execution; idle mode terminal, when there is no task scheduling period, will enter sleep mode, when the paging opportunity arrives, wake up from sleep mode, and execute the task in the corresponding idle mode joint task scheduling list; Step 5: The minimum drive test MDT measurement result is reported; each time the minimum drive test MDT measurement task is completed, check whether the MDT measurement conditions for reporting are met; if the conditions for reporting MDT measurement are met, the random access process is started, the RRC signaling connection is established, and then Report the MDT measurement results to complete the network MDT measurement requirements. 2. The method for realizing the minimum drive test function by a terminal according to claim 1, wherein the generating the idle mode joint task scheduling list is specifically: The idle mode terminal first calculates and determines the monitoring paging time 1, paging time 2, ..., paging time N, where N is an integer greater than 1, to form the execution time sequence of the normal idle mode task list; then according to the minimum drive test MDT measurement task list, calculate MDT measurement tasks, assuming MDT measurement 1, MDT measurement 2, ..., MDT measurement K, K is an integer greater than 1, generate MDT measurement cell; finally, MDT measurement cell is mapped to At the most recent monitoring paging moment, the normal idle mode task and the MDT measurement cell are combined into a processing unit for the terminal to wake up from the sleep mode, and all the processing units are combined together to form the idle mode joint task scheduling list.

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