CN110662282B - Method and device for controlling whether terminal uses synchronous frame in electric power wireless private network - Google Patents
Method and device for controlling whether terminal uses synchronous frame in electric power wireless private network Download PDFInfo
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- H—ELECTRICITY
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- H—ELECTRICITY
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Abstract
The application provides a method and a device for controlling whether a terminal uses a synchronous frame in a power wireless private network, wherein 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. The method can avoid the limitation of scheduling resources and the occurrence of inconsistent resources.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for controlling whether a terminal uses a synchronization frame in an electric wireless private network.
Background
With the development of the smart power grid, the electricity consumption information acquisition system puts new and higher requirements on communication channels. At present, the 230MHz frequency band is mainly applied to a data transmission radio station to undertake remote data acquisition work, and the provided rate is very low, so that the data transmission radio station can only be used for some simple communication applications, and the increasing service requirements of a smart power grid and a sensor network cannot be met.
The TD-LTE230 power utilization information acquisition system is a wireless communication system which is based on a TD-LTE technology, combines advanced technologies such as spectrum sensing, carrier aggregation, interference demodulation and software radio, uses discrete spectrum resources in a 230MHz frequency band in the power industry, and is innovated, researched and developed and deeply customized. The method is deeply customized according to the communication requirements of the power service, optimizes a public network TD-LTE technical system, a communication protocol and a networking structure, and improves the capacity of the terminal and the real-time performance of the service.
The 223.025-235.000 MHz frequency band is used for telemetering, remote control, data transmission and other services, and consists of a plurality of scattered 25k channels, and adjacent frequencies are assigned to other industries for use, so that no wider continuous spectrum resource exists. The number of the electric power authorization frequency points is 40, and the electric power authorization frequency points are distributed in a discrete and unequal interval mode.
Referring to fig. 1, fig. 1 is a schematic diagram of a frame structure in the TD-LTE230 technology. In fig. 1, a radio frame is composed of 5 subframes with a length of 5ms, where subframe 0 is a downlink subframe, and subframes 2, 3, and 4 are uplink subframes; subframe 1 is a special subframe, and includes 3 fields, which are a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an Uplink Pilot Time Slot (UpPTS), respectively.
And configuring a synchronization sub-band in the usable sub-band of the cell to send a main synchronization signal and an auxiliary synchronization signal 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 sub-bands supported by the communication terminal, the terminal can be divided into a single sub-band terminal and a multi-sub-band terminal. A single sub-band terminal supports only one sub-band and a multi-sub-band terminal supports at least 4 sub-bands.
The multi-subband terminal can use the synchronous subband to keep downlink synchronization while doing business, the single subband terminal can only receive the signal of the current working subband, in order to enable the single subband terminal to carry out downlink synchronization, the base station sends the synchronous signal once every 40 wireless frames in the single subband working area, and the wireless frame sending the synchronous signal is called a synchronous frame.
Two methods can be used according to the prior art:
first, all terminals use a synchronization frame.
This approach may result in the multi-subband terminal losing one radio frame per 40 radio frames to send synchronization information, and the spectral efficiency is reduced 1/40 to 2.5%.
Second, only a single subband uses the sync frame and the multi-subband terminal does not.
The multi-subband terminal can only operate in the working area. Because if a multi-subband terminal is scheduled to a camping zone, the base station and the terminal do not have consistent understanding about the synchronization frame, which in turn results in inconsistent resources.
After the terminal accesses the network, a sub-band is selected for residence, and the residence sub-band is defined as: and after the communication terminal is successfully attached, monitoring downlink control information and transmitting a sub-band of a scheduling request when no service is transmitted. The base station may schedule the UE to the camping sub-band or other sub-bands for traffic through the DCI.
In order to distinguish and process a single sub-band terminal and a multi-sub-band terminal, a base station divides all service sub-bands into a resident region and a working region, the resident sub-band transmits a synchronization frame, the single sub-band terminal can only reside in the resident sub-band region, the base station can schedule the single sub-band terminal to the resident region or the working region for service according to resource conditions, and the base station also needs to transmit the synchronization frame in the region when the single sub-band terminal is in the working region. The multi-subband terminal may reside in a residence area or a working area, but needs to do service in the working area.
It can be seen that the second method has high requirements on frequency spectrum resources in a cell, and needs to divide a special working area.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for controlling whether a terminal uses a synchronization frame in a wireless private network, which can avoid the restriction of scheduling resources and the occurrence of resource inconsistency.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a method for controlling whether a terminal uses a synchronization frame in a power wireless private network is characterized by comprising 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.
Wherein the method further comprises:
when the multi-subband terminal is initially accessed, the synchronization frame is not used by default.
Wherein the method further comprises:
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.
Wherein the method further comprises:
when a single sub-band terminal initially accesses, a synchronization frame is used by default.
Wherein,
and adding a synchronous frame switch in the radio resource reconfiguration message for informing the terminal whether to use the synchronous frame.
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.
Wherein,
and when the multi-sub-band terminal is initially accessed, the synchronization frame is not used by default.
Wherein,
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.
Wherein,
and when the single sub-band terminal is initially accessed, the synchronization frame is used by default.
Wherein,
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.
According to the technical scheme, the base station flexibly determines and informs each terminal whether to use the synchronous frame according to the terminal capacity, the frequency point condition and the number of the terminals, so that the resource scheduling limitation and the resource inconsistency can be avoided.
Drawings
FIG. 1 is a schematic diagram of a frame structure in the TD-LTE230 technology;
fig. 2 is a flowchart illustrating whether a control terminal uses a synchronization frame according to an embodiment of the present application;
fig. 3 is a flowchart illustrating whether a control terminal uses a synchronization frame according to a second embodiment of the present application;
fig. 4 is a schematic structural diagram of an apparatus applied to the above-described technology in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The embodiment of the application provides a method for controlling whether a terminal uses a synchronous frame in a power wireless private network, a base station flexibly determines and informs whether each terminal uses the synchronous frame according to the terminal capacity, the frequency point condition and the number of the terminals, and the resource scheduling limitation and the resource inconsistency can be avoided.
The following describes in detail a process of controlling whether a terminal uses a synchronization frame in an embodiment of the present application with reference to the drawings.
Example one
For a multi-subband terminal:
when the multi-subband terminal is initially accessed, the synchronization frame is not used by default.
Referring to fig. 2, fig. 2 is a flowchart illustrating a process of controlling whether a terminal uses a synchronization frame according to a first embodiment of the present application. The method comprises the following specific steps:
When the multi-sub-band terminal receives the notification of using the synchronous frame from the base station, the multi-sub-band terminal resides and works according to the existing mode of using the synchronous frame, and the base station can not allocate a special working area for the multi-sub-band terminal, so that the multi-sub-band terminal resides and works in the residence area.
And when the multi-sub-band terminal receives the notice that the base station does not use the synchronous frame, the multi-sub-band terminal performs residence and work according to the existing mode of not using the synchronous frame.
The base station informs the multi-sub-band terminal to use the synchronous frame or not, and locally records whether the multi-sub-band terminal uses the synchronous frame currently.
In specific implementation, whether the synchronization frame is used every time may be recorded according to the update time, or when the synchronization frame is used or not, the previous record may be updated, and only whether the current multi-subband terminal uses the synchronization frame or not may be recorded.
The preset threshold value can be set according to practical application.
When the frequency points in the system are less and the terminals needing to reside are more, the multi-sub-band terminal can reside and work in the residence area without allocating a special working area, and then the multi-sub-band terminal uses the synchronous frame; otherwise, the sync frame is not used.
When the base station informs the multi-sub-band terminal whether to use the synchronous frame, a synchronous frame switch can be added in the wireless resource reconfiguration message, and if the synchronous frame switch is on, the synchronous frame is used; if "off", the sync frame is not used. 1 and 0 may be used to represent on and off and are not limited to this implementation.
Example two
For a single subband terminal:
when a single sub-band terminal initially accesses, a synchronization frame is used by default.
Referring to fig. 3, fig. 3 is a schematic flowchart illustrating a process of controlling whether a terminal uses a synchronization frame according to a second embodiment of the present application. The method comprises the following specific steps:
And aiming at the single sub-band terminal, judging whether to use the synchronous frame once in each access.
The base station informs whether the single sub-band terminal uses the synchronous frame, a synchronous frame switch can be added in the wireless resource reconfiguration message, and if the wireless resource reconfiguration message is 'on', the synchronous frame is used; if "off", the sync frame is not used. 1 and 0 may be used to represent on and off and are not limited to this implementation.
Based on the same inventive concept, the application also provides a device for controlling whether the terminal uses the synchronous frame in the electric power wireless private network. Referring to fig. 4, fig. 4 is a schematic structural diagram of an apparatus applied to the above technology in the embodiment of the present application. The device includes: a determination unit 401 and a transmission unit 402;
a determining unit 401, configured to periodically determine, for a multi-subband terminal, a ratio of the number of terminals that need to reside in the system to the number of frequency points;
a sending unit 402, configured to notify the multi-subband terminal of using the synchronization frame when the determining unit 401 determines that the ratio is greater than the preset threshold and the multi-subband terminal does not use the synchronization frame; when the determining unit 401 determines 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.
When the frequency points in the system are less and the terminals needing to reside are more, the multi-sub-band terminal can reside and work in the residence area without allocating a special working area, and then the multi-sub-band terminal uses the synchronous frame; otherwise, the sync frame is not used.
When the base station informs the multi-sub-band terminal whether to use the synchronous frame, a synchronous frame switch can be added in the wireless resource reconfiguration message, and if the synchronous frame switch is on, the synchronous frame is used; if "off", the sync frame is not used. 1 and 0 may be used to represent on and off and are not limited to this implementation.
Preferably, the first and second liquid crystal films are made of a polymer,
and when the multi-sub-band terminal is initially accessed, the synchronization frame is not used by default.
Preferably, the first and second liquid crystal films are made of a polymer,
a determining unit 401, further configured to, for a single subband terminal, obtain, by a base station, capability information of the single subband terminal from a subscription database in an 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 and schedule the single subband terminal to a working area for working if the determining unit 401 determines that the capability information of the single subband terminal indicates that the synchronization frame is not needed.
And aiming at the single sub-band terminal, judging whether to use the synchronous frame once in each access.
The base station informs whether the single sub-band terminal uses the synchronous frame, a synchronous frame switch can be added in the wireless resource reconfiguration message, and if the wireless resource reconfiguration message is 'on', the synchronous frame is used; if "off", the sync frame is not used. 1 and 0 may be used to represent on and off and are not limited to this implementation.
Preferably, the first and second liquid crystal films are made of a polymer,
and when the single sub-band terminal is initially accessed, the synchronization frame is used by default.
Preferably, the first and second liquid crystal films are made of a polymer,
the sending unit 402 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.
In summary, the synchronization frame switch is added in the radio resource reconfiguration message, and the base station flexibly determines and notifies each terminal whether to use the synchronization frame according to the terminal capability, the frequency point condition and the number of the terminals, so that the resource scheduling limitation and the resource inconsistency can be avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
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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| CN112532343A (en) * | 2019-09-19 | 2021-03-19 | 普天信息技术有限公司 | Method and device for rate matching and resource mapping of downlink shared channel in synchronous frame |
| CN113133111A (en) * | 2020-01-10 | 2021-07-16 | 普天信息技术有限公司 | Uplink scheduling request processing method and device |
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| CN101030845B (en) * | 2006-03-01 | 2011-02-09 | 中国科学院上海微系统与信息技术研究所 | Transmitter, receiver and its method for FDMA |
| KR101688963B1 (en) * | 2009-12-18 | 2016-12-22 | 삼성전자주식회사 | Dual-band wireless communication appatus and method for channel allocatiion using the same |
| CN102413517B (en) * | 2010-09-25 | 2014-01-29 | 普天信息技术研究院有限公司 | Selection method of residence sub-band |
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| KR20130037507A (en) * | 2011-10-06 | 2013-04-16 | 삼성전자주식회사 | Method and apparatus for operating multi-band and multi-cell |
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| US10194388B2 (en) * | 2014-03-31 | 2019-01-29 | Samsung Electronics Co., Ltd. | Method and apparatus to enable low power synchronization for large bandwidth wireless LAN systems |
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