WO2017206554A1

WO2017206554A1 - Downlink monitoring method and device

Info

Publication number: WO2017206554A1
Application number: PCT/CN2017/074440
Authority: WO
Inventors: 杜婷
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-06-03
Filing date: 2017-02-22
Publication date: 2017-12-07
Also published as: CN107466062A

Abstract

Provided in the present invention are a downlink monitoring method and device. The method comprises: a base station monitoring quality information of an uplink configured between the base station and a terminal; the base station evaluating quality information of a downlink configured between the base station and the terminal according to the uplink quality information; and the base station instructing, according to an evaluation result, the terminal to perform an operation corresponding to the evaluation result. The technical solution of the present invention resolves the problem in the prior art in which the process of monitoring downlink quality by an NB-IoT terminal is complex and consumes power at the NB-IoT terminal. In this way the present invention saves power and prolongs battery service life of the NB-IoT terminal.

Description

Downlink monitoring method and device

Technical field

The present invention relates to the field of communications, and in particular to a downlink monitoring method and apparatus.

Background technique

For telecom operators, IoT applications such as car networking, smart healthcare, and smart home will generate massive connections, far exceeding the communication needs between people. This year's 3rd Generation Partnership Project (3GPP) officially announced the Narrow Band-IoT (NB-IOT) standard project.

NB-IOT has four major capabilities: First, wide coverage. In the same frequency band, NB-IOT has 20dB gain over existing network and 100 times coverage area. Second, it has the ability to support massive connections. NB-IOT has one fan. The zone can support 100,000 connections; the third is lower power consumption, the standby time of the NB-IOT terminal module can be as long as 10 years; the fourth is lower module cost. Focusing on the low-power, wide-coverage (LPWA) Internet of Things (IoT) market, NB-IOT is an emerging technology that can be used globally. It has the characteristics of wide coverage, many connections, low speed, low cost, low power consumption and excellent architecture. The NB-IOT uses the license band and can adopt three deployment modes: in-band, guard band, or independent carrier to coexist with the existing network.

At the 3GPP TSG RAN conference, the project was established for NB-IOT. The power consumption requirement of NB-IOT is only 1/10 of 2G, the standby time of terminal module can be up to 10 years, and the relative complexity of chip needs to reach 10% of LTE Rel-8Cat 1. It can be known from the existing Long-Term Evolution (LTE) that downlink monitoring is performed by the UE. It can be known from 36.331, 36.321, 36.133 that the UE side monitors the downlink quality. In the non-DRX mode, the UE should evaluate the radio link quality in each radio frame of the physical layer, and evaluate it in the previous time period. The relevant speed threshold (Q _out and Q _in ).

In the discontinuous reception (DRX) mode, the UE should evaluate the radio link quality at least in each DRX cycle at the physical layer, and evaluate the threshold value (Q _out and Q _in ) in the previous time period. .

If higher layer signaling indicates that a certain subframe is used for restricted radio link monitoring, the radio link quality should only be monitored in those subframes.

The UE should indicate out-of-sync when the radio link quality is worse than the threshold _{Qout in the} subframe where the radio link quality is evaluated, when the radio link quality is lower than the threshold Q _in Good time indicates in-sync to the upper level.

When T300, T301, T304 or T311 is running, when the UE receives N310 consecutive "out-of-sync" indications from the lower layer, T310 is started.

When the T310 is running, the UE receives consecutive N311 "in-sync" indications, and the UE should stop the timer T310 and stop the timer T312 if it is running.

UE downlink radio link quality should be evaluated and compared with a threshold value and the threshold value Q _out Q _in. The threshold Q _{out is} defined as the error rate at which the downlink radio link level cannot reliably receive 10% corresponding to the PDCCH, as shown in Table 1 below. The threshold Q _{in is} defined as the PDCCH error rate corresponding to a 2% PDCCH error rate where the downlink quality is significantly better than Q _out , as shown in Table 2 below.

Table 1 PDCCH/PCFICH transmission parameters for out-of-sync

Table 2 PDCCH/PCFICH transmission parameters for in-sync

When the UE side applies non-DRX, two consecutive indication intervals are at least 10 ms. When the UE side applies DRX, two consecutive indication intervals are at least max (10 ms, DRX_cycle_length).

For NB-IoT terminals, such processing is obviously complicated, and the terminal's monitoring of the downlink is also very power-hungry.

In the related art, the problem of monitoring the downlink quality through the NB-IoT terminal is complicated and consumes the power of the NB-IoT terminal, and an effective solution has not been proposed.

Summary of the invention

The embodiments of the present invention provide a downlink monitoring method and apparatus, so as to at least solve the problem that the process of monitoring downlink quality by the NB-IoT terminal in the related art is complicated and consumes the power of the NB-IoT terminal.

According to an embodiment of the present invention, a downlink monitoring method is provided, including: a base station monitoring uplink quality information between the base station and the terminal; and the base station evaluating the quality information according to the uplink Determining quality information of a downlink between the base station and the terminal; the base station notifying the terminal to perform an operation corresponding to the evaluation result according to the evaluation result.

Optionally, the base station notifying the terminal to perform an operation corresponding to the evaluation result according to the evaluation result, including:

When the evaluation result indicates that the downlink quality information is lower than the first threshold, the base station notifies the terminal to perform at least the following processes: out of synchronization, release radio resource control RRC connection, stop to the base station send data.

Optionally, the base station notifies the terminal to retransmit the data that fails to be transmitted to the base station when one of the following conditions is satisfied: the next reporting period comes; the next retransmission time point comes; the terminal sets the retransmission The data timer time arrives.

Optionally, the timer time is determined by at least: broadcast information sent by the base station, or specified signaling sent by the base station.

Optionally, the base station notifies the terminal to perform a comparison with the evaluation result according to the evaluation result. The operations should include:

And when the number of times that the evaluation result indicates that the quality information of the downlink is lower than the second threshold is greater than n, the first timer is started, where n is a preset integer value.

Optionally, the method further includes:

During the timing of the first timer, if the base station detects that the number of times the quality information is higher than the third threshold is less than m, the base station notifies the terminal to perform at least the following processing: Release the radio resource control RRC connection and stop transmitting data to the base station.

According to another embodiment of the present invention, there is further provided a downlink monitoring apparatus, applicable to a base station, comprising: a monitoring module, configured to monitor uplink quality information between the base station and the terminal; an evaluation module, setting Evaluating quality information of downlink information between the base station and the terminal according to the quality information of the uplink; and executing, configured to notify the terminal to perform an operation corresponding to the evaluation result according to the evaluation result.

Optionally, the executing module includes: a first notification unit, configured to notify the terminal to perform at least the following processing when the evaluation result indicates that the quality information of the downlink is lower than the first threshold: Out of step, release radio resource control RRC connection, stop sending data to the base station.

Optionally, the executing module includes: a starting unit, configured to start a first timer when the number of times that the evaluation result indicates that the quality information of the downlink is lower than the second threshold is greater than n, where , n is a preset integer value.

Optionally, the executing module further includes: a second notification unit, configured to: when the base station detects that the quality information is higher than the third threshold, the number of times is less than The m is notified to the terminal to perform at least the following processing: out of synchronization, release of the radio resource control RRC connection, and stop sending data to the base station.

In the embodiment of the present invention, a computer storage medium is further provided, and the computer storage medium may store an execution instruction for performing the implementation of the downlink monitoring method in the foregoing embodiment.

According to the embodiment of the present invention, the downlink information of the base station and the terminal is obtained by the base station, The downlink quality is not monitored by the terminal, and the above technical solution solves the problem that the process of monitoring the downlink quality through the NB-IoT terminal is complicated and consumes the power of the NB-IoT terminal, thereby saving the terminal power. This makes the battery life of the NB-IoT terminal longer.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a downlink monitoring method according to an embodiment of the present invention;

2 is a structural block diagram of a downlink monitoring apparatus according to an embodiment of the present invention;

FIG. 3 is a structural block diagram of an execution module 22 of a downlink monitoring apparatus according to an embodiment of the present invention; FIG.

4 is a flowchart of downlink monitoring of a base station according to a preferred embodiment of the present invention;

FIG. 5 is a schematic flowchart of downlink monitoring of a base station according to a second preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

Example 1

In the embodiment of the present invention, a downlink monitoring method is provided. FIG. 1 is a flowchart of a downlink monitoring method according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:

Step S102: The base station monitors uplink quality information between the base station and the terminal.

Step S104: The base station evaluates downlink quality information between the base station and the terminal according to the quality information of the uplink.

Step S106, the base station notifies the terminal to perform an operation corresponding to the evaluation result according to the evaluation result.

Through the above steps, the quality information of the uplink of the base station and the terminal is monitored by the base station, and the quality information of the downlink is determined by the quality information of the uplink, and the quality of the downlink is not performed by the terminal. Monitoring, through the above technical solution, solves the problem that the process of monitoring the downlink quality through the NB-IoT terminal is complicated and consumes the power of the NB-IoT terminal in the related art, thereby saving the terminal power and making the battery life of the NB-IoT terminal Longer.

There are a plurality of implementation manners in the foregoing step S106. In the embodiment of the present invention, the following two implementation manners are provided:

First implementation

When the evaluation result indicates that the quality information of the downlink is lower than the first threshold, the base station notifies the terminal to perform at least the following processing: out of synchronization, release of the radio resource control RRC connection, and stop sending data to the base station.

In addition, the base station notifies the terminal to retransmit the data that failed to transmit to the base station when one of the following conditions is satisfied: the next reporting period comes; the next retransmission time point comes; the retransmission data timer time set by the terminal arrives.

Second implementation

When the evaluation result indicates that the number of times that the quality information of the downlink is lower than the second threshold is greater than n, the first timer is started, where n is a preset integer value.

In the embodiment of the present invention, when the base station detects that the number of times the quality information is higher than the third threshold is less than m, the base station notifies the terminal to perform at least the following processing: out of synchronization and release of the radio resource. Control RRC connection and stop transmitting data to the base station.

It should be noted that the implementation of step S104 may be a feature of the channel reciprocity through the base station. To achieve, the quality information of the downlink can be determined by the quality information of the uplink.

The above two implementations are explained below in conjunction with an example, but are not intended to limit the implementation of the present invention.

Since the NB-IoT terminal is a fixed static or low-speed terminal, it is not sensitive to the temporality of the channel, and the NB-IoT terminal generally performs monitoring activities, and periodically reports the monitoring data to the base station, and the delay requirement is not high.

Based on the above characteristics, the present invention utilizes the channel reciprocity feature, and the base station replaces the terminal to monitor the downlink out-of-synchronization.

The first implementation manner is: when the base station detects that the link quality is low, that is, lower than a certain threshold A (corresponding to the first threshold of the foregoing embodiment), the trigger indication message notifies the terminal to perform active out-of-synchronization, and the terminal Release the RRC connection, stop sending data, retransmit the data in the next reporting period or the next time trigger point (indicating the next retransmission time point in the indication message) or set the timer T in the terminal, when T is reached, Trigger data retransmission, the value of T can be given by a broadcast message (such as SIB2), or by a dedicated message (indicating a message).

The second implementation manner: using a method similar to terminal monitoring, defining two threshold values, one is the out-of-step threshold B (corresponding to the first threshold of the above embodiment), and the other is the synchronous threshold C. (corresponding to the second threshold value of the foregoing embodiment), the base station side measures the link quality, and when it is lower than the threshold value B, it is recorded as one out-of-step indication, when receiving n out-of-step indications, The timer T1 is started. When the link quality is higher than the threshold C, it is recorded as a synchronization indication. When the m synchronization indications are received within the T1 time, the link is restored. If no M is received within the T1 time. When the synchronization indication is triggered, the base station sends an out-of-synchronization request to the terminal, and after receiving the request, the terminal releases the RRC connection and stops sending data. Retransmitting data or initiating terminal timer T2 at the next reporting period or retransmission time point (indicated in the out-of-synchronization request), and triggering retransmission when T2 expires, the value of T2 is given by broadcast information (such as SIB2) or Proprietary signaling indication (as indicated in the out-of-step request).

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform. However, hardware can also be used, but in many cases the former is a better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present invention.

Example 2

In this embodiment, a downlink monitoring device is also provided, which is applied to a base station, and the device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of a downlink monitoring apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes:

The monitoring module 20 is configured to monitor quality information of an uplink between the base station and the terminal;

The evaluation module 22 is configured to evaluate quality information of the downlink between the base station and the terminal according to the quality information of the uplink;

The executing module 24 is configured to notify the terminal to perform an operation corresponding to the evaluation result according to the evaluation result.

Through the function of the above module, the base station monitors the uplink quality information of the base station and the terminal, and then determines the quality information of the downlink through the quality information of the uplink, without the quality of the downlink through the terminal. Through monitoring, the above technical solution solves the problem that the process of monitoring the downlink quality through the NB-IoT terminal is complicated and consumes the power of the NB-IoT terminal in the related art, thereby saving the terminal power and making the battery of the NB-IoT terminal. Longer life.

FIG. 3 is a structural block diagram of an execution module 24 of a downlink monitoring apparatus according to an embodiment of the present invention. As shown in FIG. 3, the method includes: a first notification unit 240 configured to indicate that the quality information of the downlink is lower than the first in the evaluation result. At the threshold value, the terminal is notified to perform at least the following processing: out of step, release without The line resource controls the RRC connection and stops transmitting data to the base station.

Optionally, the executing module 24 includes: a starting unit 242, configured to start the first timer when the number of times that the quality information of the downlink is lower than the second threshold is greater than n, where n is a pre- The integer value set.

Optionally, the executing module 24 further includes: a second notification unit 244, configured to set, in a timing time of the first timer, if the evaluation result indicates that the quality information of the downlink is higher than the third threshold, the number of times is less than m, Then, the terminal is notified to perform at least the following processing: out of synchronization, release of the radio resource control RRC connection, and stop sending data to the base station.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination. The forms are located in different processors.

In order to better understand the above-mentioned downlink monitoring process, the above technical solutions are explained below in conjunction with the preferred embodiments.

Preferred embodiment 1

Scenario 1: Place a smart water meter somewhere, monitor the water usage data, and set a periodic (cycle T _meter ) to upload monitoring data to the base station.

FIG. 4 is a flowchart of downlink monitoring of a base station according to a preferred embodiment of the present invention. As shown in FIG. 4, the method mainly includes the following steps:

Step S402: When the uploading period expires, the smart water meter terminal uploads the monitoring data to the base station after entering the connected state.

Step S404: The base station monitors the link quality. When the link quality is lower than the threshold A, the base station is triggered to send an indication message to the terminal, and the terminal is notified to perform the active out-of-synchronization. The indication message includes the time for the next data to be uploaded by the terminal.

Step S406: The base station releases the radio bearer.

Step S408: After receiving the indication message, the terminal stops sending monitoring data to the base station, and releases the RRC connection, and enters the idle state.

Step S410: The terminal starts the timer T _retransmit . When T _retransmit arrives, the triggering terminal starts to perform RRC reconnection and retransmits data to the base station.

Preferred embodiment two

Scenario 2: NB-IoT irrigation monitoring device is installed in the vineyard to monitor the air temperature, air humidity, soil temperature, soil moisture, light intensity, carbon dioxide concentration and other parameters required for crop growth. The mobile phone or remote computer can be used to grasp the crop scene in real time. The environmental status information, the expert system diagnoses the growth status of crops and the status of pests and diseases according to environmental parameters. At the same time, in the case of environmental parameters exceeding the standard, the system can remotely control the sunshade, fan, irrigation device, etc., to achieve intelligent management of agricultural production.

FIG. 5 is a schematic flowchart of downlink monitoring of a base station according to a preferred embodiment 2 of the present invention. As shown in FIG. 5, the method mainly includes the following steps:

Step S502: The monitoring device in the vineyard uploads monitoring data to the base station.

Step S504: The base station monitors the link quality. When the link quality is lower than a certain threshold B, one out-of-step indication is recorded. When n indications are reached, the timer T _{in-sync is} started.

Step S506: In the T _in-sync , when the link quality is higher than a certain threshold C, it is recorded as a synchronization indication. When m indications are reached, the link is considered to be restored.

If no indication is received in the T _in-sync , the base station is triggered to send an indication message to the terminal to notify the terminal to take the initiative to lose the step, and the indication message includes the time for sending the next data.

Step S508: The base station releases the radio bearer.

Step S510: After receiving the indication message, the terminal stops sending monitoring data to the base station, and releases the RRC connection.

Step S512: The terminal starts the timer T _retransmit . When T _retransmit arrives, the triggering terminal starts the RRC reconnection, and the RRC connection is established, and the data is retransmitted to the base station.

In summary, in the related art, the process of monitoring the downlink quality by the NB-IoT terminal is complicated and consumes the power of the NB-IoT terminal, thereby saving the terminal power. The battery life of the NB-IoT terminal is longer.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1. Monitor uplink quality information between the base station and the terminal.

S2. The quality information of the downlink between the base station and the terminal is evaluated according to the quality information of the uplink.

S3. The terminal is notified to perform an operation corresponding to the evaluation result according to the evaluation result.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The foregoing technical solution provided by the embodiment of the present invention can be applied to the downlink monitoring process, where the base station acquires the downlink quality information of the base station and the terminal, and does not monitor the downlink quality by using the terminal, and solves the foregoing technical solution. In the related art, the process of monitoring downlink quality by the NB-IoT terminal is complicated and consumes the power of the NB-IoT terminal, thereby saving terminal power and making the battery life of the NB-IoT terminal longer.

Claims

A downlink monitoring method includes:

The base station monitors uplink quality information between the base station and the terminal;

The base station estimates quality information of downlink information between the base station and the terminal according to the quality information of the uplink;

The base station notifies the terminal to perform an operation corresponding to the evaluation result according to the evaluation result.
The method according to claim 1, wherein the base station notifies the terminal to perform an operation corresponding to the evaluation result according to the evaluation result, including:

When the evaluation result indicates that the downlink quality information is lower than the first threshold, the base station notifies the terminal to perform at least the following processes: out of synchronization, release radio resource control RRC connection, stop to the base station send data.
The method according to claim 2, wherein the base station notifies the terminal to retransmit the data of the failed transmission to the base station when one of the following conditions is satisfied: the next reporting period comes; the next retransmission time point comes The retransmission data timer set by the terminal arrives.
The method according to claim 3, wherein the timer time is determined at least by: broadcast information transmitted by the base station or specified signaling sent by the base station.
The method according to claim 1, wherein the base station notifies the terminal to perform an operation corresponding to the evaluation result according to the evaluation result, including:

And when the number of times that the evaluation result indicates that the quality information of the downlink is lower than the second threshold is greater than n, the first timer is started, where n is a preset integer value.
The method of claim 5 wherein the method further comprises:

During the timing of the first timer, if the base station detects that the number of times the quality information is higher than the third threshold is less than m, the base station notifies the terminal to perform at least the following processing: Release the radio resource control RRC connection and stop transmitting data to the base station.
A downlink monitoring device is applied to a base station, including:

a monitoring module configured to monitor quality information of an uplink between the base station and the terminal;

An evaluation module, configured to evaluate quality information of a downlink between the base station and the terminal according to the quality information of the uplink;

And an execution module, configured to notify the terminal to perform an operation corresponding to the evaluation result according to the evaluation result.
The apparatus of claim 7, wherein the execution module comprises:

The first notification unit is configured to notify the terminal to perform at least the following processing when the evaluation result indicates that the quality information of the downlink is lower than the first threshold: out of synchronization, release radio resource control, RRC connection, stop Sending data to the base station.
The apparatus of claim 7, wherein the execution module comprises:

And activating unit, configured to start the first timer when the number of times that the evaluation result indicates that the quality information of the downlink is lower than the second threshold is greater than n, where n is a preset integer value.
The apparatus of claim 9, wherein the execution module further comprises:

a second notification unit, configured to: in a timing time of the first timer, if the base station detects that the quality information is higher than a third threshold value by less than m, notify the station The terminal performs at least the following processing: out of synchronization, releasing the radio resource control RRC connection, and stopping sending data to the base station.