CN110662282B - Method and device for controlling whether a terminal uses a synchronization frame in a power wireless private network - Google Patents

Abstract

The present application provides a method and device for controlling whether a terminal uses a synchronization frame in a power wireless private network. The method includes: for multi-subband terminals, periodically determining the ratio of the number of terminals that need to reside in the system to the number of frequency points; When it is determined that the ratio is greater than a preset threshold, and the multi-subband terminal does not use the synchronization frame, the multi-subband terminal is notified to use the synchronization frame; when it is determined that the ratio is not greater than the preset threshold, and the multi-subband terminal uses the synchronization frame frame, notify the multi-subband terminal not to use the synchronization frame. The method can avoid the limitation of scheduling resources and the occurrence of resource inconsistency.

Description

Method and device for controlling whether a terminal uses a synchronization frame in a power wireless private network

technical field

The present invention relates to the field of communication technologies, in particular to a method and device for controlling whether a terminal uses a synchronization frame in a power wireless private network.

Background technique

With the development of smart grid, the electricity information collection system has put forward new and higher requirements for communication channels. At present, the 230MHz frequency band is mainly used in digital radio stations to undertake remote data collection work. Due to the low rate provided, it can only be used for some simple communication applications, and cannot meet the growing business needs of smart grids and sensor networks.

TD-LTE230 power consumption information acquisition system is based on TD-LTE technology, combined with advanced technologies such as spectrum sensing, carrier aggregation, interference demodulation, software radio, etc., using discrete spectrum resources in the power industry in the 230MHz frequency band, innovative research and development, deep customization of wireless communication system. According to the in-depth customization of power business communication requirements, the public network TD-LTE technology system, communication protocol and networking structure are optimized to improve terminal capacity and real-time service.

The 223.025-235.000MHz frequency band is used for telemetry, remote control, data transmission and other services. This frequency band consists of multiple scattered 25k channels, and the adjacent frequencies have been assigned to other industries for use, and there is no wide continuous spectrum resource. . There are 40 authorized frequency points in total, distributed in discrete and unequal intervals.

Referring to FIG. 1, FIG. 1 is a schematic diagram of a frame structure in the TD-LTE230 technology. In Figure 1, a radio frame consists of 5 subframes with a length of 5ms, in which subframe 0 is a downlink subframe, subframe 2, subframe 3, and subframe 4 are uplink subframes; subframe 1 is a special subframe , including 3 fields, namely Downlink Pilot Time Slot (DwPTS), Guard Period (GP) and Uplink Pilot Time Slot (UpPTS).

A synchronization subband is configured in the available subbands of the cell to send the primary synchronization signal and the secondary synchronization signal, which are used for the UE to perform cell search and downlink synchronization. During the service process, the UE still needs to maintain downlink synchronization with the base station.

According to the number of service subbands supported by a communication terminal, terminals can be classified into single subband terminals and multi-subband terminals. A single-subband terminal supports only one subband, and a multi-subband terminal supports at least four subbands.

A multi-subband terminal can use the synchronization subband to maintain downlink synchronization while doing business. A single-subband terminal can only receive the signal of the current working subband. The frame sends a synchronization signal once, and the radio frame that sends the synchronization signal is called a synchronization frame.

Two methods can be used according to the prior art:

First, all terminals use synchronization frames.

This method will cause the multi-subband terminal to lose one radio frame to send synchronization information every 40 radio frames, and reduce the spectral efficiency by 1/40=2.5%.

The second is that only a single subband uses a synchronization frame, and a multi-subband terminal does not.

Multi-subband terminals can only work in the work area. This is because if the multi-subband terminal is scheduled to the camping area, the base station and the terminal have inconsistent understandings of the synchronization frame, thereby resulting in inconsistent resources.

After the terminal accesses the network, it will select a subband for camping. The camping subband is defined as: after the communication terminal is successfully attached, it monitors the downlink control information and sends the scheduling request when there is no service transmission. The base station may schedule the UE to the camping subband or other subbands to perform services through DCI.

In order to distinguish and process single-subband terminals and multi-subband terminals, the base station divides all service subbands into a resident area and a working area, and the resident subband sends synchronization frames. Single-subband terminals can only reside in the resident subband area. According to resource conditions, it can be scheduled to the resident area or the working area for service. When the single-subband terminal is in the working area, the base station also needs to send a synchronization frame in this area. The multi-subband terminal can reside in the resident area or the work area, but needs to perform services in the work area.

It can be seen that the second method has higher requirements on the spectrum resources in the cell, and needs to be divided into a special working area.

SUMMARY OF THE INVENTION

In view of this, the present application provides a method and apparatus for controlling whether a terminal uses a synchronization frame in a power wireless private network, which can avoid the limitation of scheduling resources and the occurrence of resource inconsistency.

In order to solve the above-mentioned technical problems, the technical solution of the present application is realized as follows:

A method for controlling whether a terminal uses a synchronization frame in a power wireless private network, characterized in that the method comprises:

For multi-subband terminals, periodically determine the ratio of the number of terminals that need to reside in the system to the number of frequency points;

When it is determined that the ratio is greater than the preset threshold, and the multi-subband terminal does not use the synchronization frame, notify the multi-subband terminal to use the synchronization frame;

When it is determined that the ratio is not greater than the preset threshold and the multi-subband terminal uses the synchronization frame, the multi-subband terminal is notified not to use the synchronization frame.

Wherein, the method further includes:

When a multi-subband terminal initially accesses, the synchronization frame is not used by default.

Wherein, the method further includes:

For a single-subband terminal, during the access process of the single-subband terminal, the base station obtains the capability information of the single-subband terminal from the subscription database, and if the capability information of the single-subband terminal indicates that no synchronization frame is required, it notifies the single-subband terminal that Using the synchronization frame, the single subband terminal is scheduled to work in the work area.

Wherein, the method further includes:

When a single-subband terminal initially accesses, a synchronization frame is used by default.

in,

A synchronization frame switch is added to the radio resource reconfiguration message to notify the terminal whether to use the synchronization frame.

A device for controlling whether a terminal uses a synchronization frame in a power wireless private network, the device comprising: a determining unit and a sending unit;

The determining unit is used to periodically determine the ratio of the number of terminals that need to reside in the system to the number of frequency points for a multi-subband terminal;

The sending unit is configured to notify the multi-subband terminal to use the synchronization frame when the determination unit determines that the ratio is greater than the preset threshold and the multi-subband terminal does not use the synchronization frame; The ratio is not greater than the preset threshold, and when the multi-subband terminal uses the synchronization frame, the multi-subband terminal is notified not to use the synchronization frame.

in,

When the multi-subband terminal initially accesses, the synchronization frame is not used by default.

in,

The determining unit is further configured to, for a single-subband terminal, during the access process of the single-subband terminal, the base station acquires the capability information of the single-subband terminal from the subscription database;

The sending unit is further configured to notify the single subband terminal not to use the synchronization frame if the determining unit determines that the capability information of the single subband terminal indicates that the synchronization frame is not required, and schedule the single subband terminal to work in the working area.

in,

When the single-subband terminal initially accesses, a synchronization frame is used by default.

in,

The sending unit is further configured to add a synchronization frame switch in the radio resource reconfiguration message to notify the terminal whether to use the synchronization frame.

It can be seen from the above technical solutions that in the present application, the base station flexibly determines and notifies each terminal whether to use a synchronization frame according to the terminal capability, frequency condition and the number of terminals, which can avoid the limitation of scheduling resources and the occurrence of resource inconsistency.

Description of drawings

1 is a schematic diagram of a frame structure in the TD-LTE230 technology;

2 is a schematic flowchart of controlling whether a terminal uses a synchronization frame in Embodiment 1 of the present application;

3 is a schematic flowchart of controlling whether a terminal uses a synchronization frame in Embodiment 2 of the present application;

FIG. 4 is a schematic structural diagram of a device applied to the above technology in an embodiment of the present application.

Detailed ways

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

The embodiment of the present application provides a method for controlling whether a terminal uses a synchronization frame in a power wireless private network. The base station flexibly determines and notifies each terminal whether to use a synchronization frame according to terminal capabilities, frequency conditions, and the number of terminals, which can avoid scheduling resources. limitations and the occurrence of resource inconsistencies.

The following describes the process of controlling whether the terminal uses the synchronization frame in the embodiment of the present application in detail with reference to the accompanying drawings.

Example 1

For multi-subband terminals:

When a multi-subband terminal initially accesses, the synchronization frame is not used by default.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of controlling whether a terminal uses a synchronization frame in Embodiment 1 of the present application. The specific steps are:

Step 201: For multi-subband terminals, the base station periodically determines the ratio of the number of terminals that need to reside in the system to the number of frequency points.

Step 202, when the base station determines that the ratio is greater than a preset threshold and the multi-subband terminal does not use the synchronization frame, it notifies the multi-subband terminal to use the synchronization frame. End this process.

When the multi-subband terminal receives the notification from the base station to use the synchronization frame, it will camp and work according to the existing method of using the synchronization frame. Stay area to stay and work.

Step 203, when the base station determines that the ratio is not greater than a preset threshold and the multi-subband terminal uses the synchronization frame, it notifies the multi-subband terminal not to use the synchronization frame.

When the multi-subband terminal receives the notification from the base station that the synchronization frame is not used, it performs camping and operation according to the existing mode of not using the synchronization frame.

After notifying the multi-subband terminal to use the synchronization frame or not to use the synchronization frame, the base station records locally whether the multi-subband terminal currently uses the synchronization frame.

In specific implementation, whether the synchronization frame is used each time can be recorded according to the update time, or the previous record can be updated when whether the synchronization frame is used or not, and only whether the current multi-subband terminal uses the synchronization frame can be recorded.

The preset threshold can be set according to the actual application.

When there are few intermediate frequency points in the system and many terminals need to reside, it is not necessary to allocate a special working area, but to make the multi-subband terminals reside and work in the residency area, and then let the multi-subband terminals use the synchronization frame; Otherwise, no sync frame is used.

When the base station notifies the multi-subband terminal whether to use the synchronization frame, it can add the synchronization frame switch in the radio resource reconfiguration message. If it is "on", the synchronization frame is used; if it is "off", the synchronization frame is not used. 1s and 0s may be used to represent on and off, and are not limited to this implementation.

Embodiment 2

For single subband termination:

When a single-subband terminal initially accesses, a synchronization frame is used by default.

Referring to FIG. 3 , FIG. 3 is a schematic flowchart of controlling whether a terminal uses a synchronization frame in Embodiment 2 of the present application. The specific steps are:

Step 301 , for a single-subband terminal, the base station acquires capability information of the single-subband terminal from a subscription database during the access process of the single-subband terminal.

Step 302, if the base station determines that the capability information of the single-subband terminal indicates that the synchronization frame is not required, it notifies the single-subband terminal not to use the synchronization frame, and schedules the single-subband terminal to work in the working area.

For a single-subband terminal, it is sufficient to determine whether to use a synchronization frame at each access.

When the base station notifies the single-subband terminal whether to use the synchronization frame, it can add the synchronization frame switch in the radio resource reconfiguration message. If it is "on", the synchronization frame is used; if it is "off", the synchronization frame is not used. 1s and 0s may be used to represent on and off, and are not limited to this implementation.

Based on the same inventive concept, the present application also provides an apparatus for controlling whether a terminal uses a synchronization frame in a power wireless private network. Referring to FIG. 4 , FIG. 4 is a schematic structural diagram of a device applied to the above technology in an embodiment of the present application. The apparatus includes: a determining unit 401 and a sending unit 402;

Determining unit 401, configured to periodically determine the ratio of the number of terminals that need to reside in the system to the number of frequency points for multi-subband terminals;

The sending unit 402 is configured to notify the multi-subband terminal to use the synchronization frame when the determining unit 401 determines that the ratio is greater than a preset threshold and the multi-subband terminal does not use the synchronization frame; when the determining unit 401 determines that the ratio is not When the value is greater than the preset threshold and the multi-subband terminal uses the synchronization frame, the multi-subband terminal is notified not to use the synchronization frame.

When there are few intermediate frequency points in the system and many terminals need to reside, it is not necessary to allocate a special working area, but to make the multi-subband terminals reside and work in the residency area, and then let the multi-subband terminals use the synchronization frame; Otherwise, no sync frame is used.

When the base station notifies the multi-subband terminal whether to use the synchronization frame, it can add the synchronization frame switch in the radio resource reconfiguration message. If it is "on", the synchronization frame is used; if it is "off", the synchronization frame is not used. 1s and 0s may be used to represent on and off, and are not limited to this implementation.

Preferably,

When the multi-subband terminal initially accesses, the synchronization frame is not used by default.

Preferably,

The determining unit 401 is further configured to, for a single-subband terminal, acquire capability information of the single-subband terminal from the subscription database during the access process of the single-subband terminal;

The sending unit 402 is further configured to notify the single subband terminal not to use the synchronization frame if the determining unit 401 determines that the capability information of the single subband terminal indicates that the synchronization frame is not required, and schedule the single subband terminal to work in the working area.

For a single-subband terminal, it is sufficient to determine whether to use a synchronization frame at each access.

When the base station notifies the single-subband terminal whether to use the synchronization frame, it can add the synchronization frame switch in the radio resource reconfiguration message. If it is "on", the synchronization frame is used; if it is "off", the synchronization frame is not used. 1s and 0s may be used to represent on and off, and are not limited to this implementation.

Preferably,

When the single-subband terminal initially accesses, a synchronization frame is used by default.

Preferably,

The sending unit 402 is further configured to add a synchronization frame switch in the radio resource reconfiguration message, to notify the terminal whether to use the synchronization frame.

To sum up, the present application adds a synchronization frame switch in the radio resource reconfiguration message, and the base station flexibly determines and notifies each terminal whether to use a synchronization frame according to the terminal capability, frequency situation and the number of terminals, which can avoid the limitation of scheduling resources and The occurrence of resource inconsistency.

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 present invention. within the scope of protection.

Claims (10)

1. A method for controlling whether a terminal uses a synchronous frame in a power wireless private network is applied to a base station, and is characterized in that the method comprises the following steps:

for a multi-sub-band terminal, periodically determining the ratio of the number of terminals needing to reside in the system to the number of frequency points;

when the ratio is determined to be larger than a preset threshold value and the multi-sub-band terminal does not use the synchronous frame, informing the multi-sub-band terminal to use the synchronous frame;

and when the ratio is determined to be not greater than the preset threshold and the multi-subband terminal uses the synchronization frame, informing the multi-subband terminal not to use the synchronization frame.

2. The method of claim 1, further comprising:

when the multi-subband terminal is initially accessed, the synchronization frame is not used by default.

3. The method of claim 1, further comprising:

and for the single sub-band terminal, in the access process of the single sub-band terminal, the base station acquires the capacity information of the single sub-band terminal from a signed database, and if the capacity information of the single sub-band terminal indicates that a synchronous frame is not needed, the single sub-band terminal is informed not to use the synchronous frame, and the single sub-band terminal is scheduled to a working area to work.

4. The method of claim 3, further comprising:

when a single sub-band terminal initially accesses, a synchronization frame is used by default.

5. The method according to any one of claims 1 to 4,

and adding a synchronous frame switch in the radio resource reconfiguration message for informing the terminal whether to use the synchronous frame.

6. An apparatus for controlling whether a terminal uses a synchronization frame in a power wireless private network, the apparatus comprising: a determining unit and a transmitting unit;

the determining unit is used for periodically determining the ratio of the number of terminals needing to reside in the system to the number of frequency points for the multi-sub-band terminal;

the sending unit is configured to notify the multi-subband terminal of using the synchronization frame when the determining unit determines that the ratio is greater than a preset threshold and the multi-subband terminal does not use the synchronization frame; and when the determining unit determines that the ratio is not greater than a preset threshold and the multi-subband terminal uses the synchronization frame, informing the multi-subband terminal not to use the synchronization frame.

7. The apparatus of claim 6,

and when the multi-sub-band terminal is initially accessed, the synchronization frame is not used by default.

8. The apparatus of claim 6,

the determining unit is further configured to, for a single sub-band terminal, obtain, by the base station, capability information of the single sub-band terminal from a subscription database in an access process of the single sub-band terminal;

the sending unit is further configured to notify the single subband terminal not to use the synchronization frame if the determining unit determines that the capability information of the single subband terminal indicates that the synchronization frame is not needed, and schedule the single subband terminal to a working area for working.

9. The apparatus of claim 8,

and when the single sub-band terminal is initially accessed, the synchronization frame is used by default.

10. The apparatus according to any one of claims 6 to 9,

the sending unit is further configured to add a synchronization frame switch in the radio resource reconfiguration message, and is configured to notify the terminal whether to use a synchronization frame.

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